CN108868613A - Fishbone well waterpower drill bit creeps into hydraulic parameters Multipurpose Optimal Method and device - Google Patents

Abstract

The invention discloses a multi-objective optimization method for drilling parameters of a fishbone well hydraulic drill bit, which is characterized in that it includes constructing a multi-objective function for optimizing the drilling parameters of a fishbone well hydraulic drill bit, wherein the multi-objective function includes hydraulic parameters and structural parameters; The constraint conditions of the multi-objective function for the optimization of the hydraulic drill bit drilling parameters of the fishbone well, the multi-objective optimization model of the hydraulic drill bit drilling parameters of the fishbone well is established according to the constraint conditions; the multi-objective optimization model of the hydraulic drill bit drilling parameters of the fishbone well The drilling parameters of the fishbone well hydraulic drill are used to realize the multi-objective optimization of the fishbone well hydraulic drill drilling parameters. The invention provides a multi-objective optimization method for drilling parameters of a hydraulic drill bit in a fishbone well, which optimizes the drilling parameters according to constraint conditions, and has great flexibility and wide practicability.

Description

Method and device for multi-objective optimization of hydraulic parameters of hydraulic drill bit in fishbone well

technical field

The invention relates to the technical field of underground resources drilling and production engineering, in particular to a method and device for multi-objective optimization of hydraulic parameters for drilling hydraulic drill bits in fishbone wells.

Background technique

The fishbone well drilling technology has been widely used in the production of conventional oil and gas reservoirs in my country because it can connect oil and gas reservoirs efficiently, accurately and controllably. It can open up to 300 branches in the oil and gas layer at one time, greatly increasing the exposed area of the oil and gas reservoir, and the output is high.

Abrasive jet is one of the commonly used jet technologies in fishbone drilling technology. It adds solid abrasive particles into high-pressure water jet or high-pressure slurry jet, and uses water or slurry as the carrier of abrasive particles, so that the accelerated abrasive directly impacts the material. Abrasive jet can enhance the rock-breaking ability of the drill bit, and has the characteristics of high mechanical drilling speed and a small amount of drill bit wear, and is widely used in the field of petroleum engineering. The rotating abrasive jet is the process of forming a rotating jet by adding a swirling device upstream of the nozzle outlet. When the high-pressure fluid flows through the nozzle, it passes through the nozzle's flow guide elements (such as impellers or flow guide grooves) to generate a three-dimensional velocity. The shape of the jet, the rotating jet is trumpet-shaped, and the trajectory of the jet pointing is spiral, so it has obvious diffusivity and can form a much larger impact area than the conventional round jet.

The main parts of the rotating abrasive jet include impeller, nozzle and impeller bushing. The structural parameters of the impeller and the size of the nozzle are extremely important for the rotating abrasive jet. The number of blades of the impeller, the outlet angle, the length of the impeller and other parameters have a certain influence on the diffusion angle of the rotating abrasive jet and the formation of holes in rock breaking. The impeller bushing and the impeller are connected together through interference fit, and the size of the nozzle is also important Impact.

Based on the above situation, there is an urgent need for an optimization method that comprehensively considers the multi-objective hydraulic parameters of the impeller, nozzle and impeller bushing to guide the design and construction of field operations.

Contents of the invention

In order to solve the above problems, the present invention provides a multi-objective optimization method for drilling hydraulic parameters of a fishbone well with a hydraulic drill bit. Technical scheme of the present invention is as follows:

On the one hand, the present invention provides, a kind of multi-objective optimization method of hydraulic drill bit drilling parameters of fishbone well, comprising constructing a multi-objective function for optimizing the drilling parameters of hydraulic drill bit of fishbone well, wherein the multi-objective function includes hydraulic parameters and structural parameters; Determine the constraints of the multi-objective function of the optimization of the fishbone well hydraulic drill bit drilling parameters, set up the multi-objective optimization model of the fishbone stab well hydraulic drill bit drilling parameters according to the constraint conditions; according to the fishbone stab well hydraulic drill bit drilling parameters The multi-objective optimization model determines the drilling parameters of the hydraulic drill bit for the fishbone well, so as to realize the multi-objective optimization of the drilling parameters for the hydraulic drill bit for the fishbone well.

Optionally, the fishbone well hydraulic drill bit includes a rotating abrasive jet nozzle, an impeller and an impeller bushing.

Optionally, the multi-objective function for optimizing the drilling parameters of the fishbone well hydraulic drill bit is: F(x)=α ₁ f ₁ (x)+α ₂ f ₂ (x), where f ₁ (x) is Hydraulic parameters, f ₂ (x) is the structural parameter; α ₁ and α ₂ are the weight values of each function, α ₁ +α ₂ =1.

Optionally, the calculation formula of the minimum interference amount δ _min is: δ _min = e _α min + e _{i min} ; wherein, e _α min is that the containing part in the inner hole of the impeller bushing can withstand the force from the axial press-in The required minimum diameter change; e _{i min} is the required minimum diameter change when the contained part of the impeller can withstand the axial pressing force;

Optionally, the formula for calculating the maximum interference amount δ _max is: δ _max = e _αmax + e _{i max} ; wherein, e _αmax is the allowable value when the containing part of the inner hole of the impeller bushing does not produce plastic deformation The maximum diameter change; e _{i max} is the allowable maximum diameter change of the contained part of the impeller without plastic deformation. .

Optionally, the construction of a multi-objective function for optimizing the drilling parameters of the fishbone well hydraulic drill bit, wherein the multi-objective function includes hydraulic parameters and structural parameters, specifically includes determining the required parameters according to the drilling design parameters and the formation soil parameters in the operation area. The size of the nozzle in the above hydraulic parameters.

On the other hand, the present invention provides a multi-objective optimization device for drilling parameters of a fishbone well hydraulic drill bit, which is characterized in that it includes:

The multi-objective function building unit is used to construct the multi-objective function for optimizing the drilling parameters of the fishbone well hydraulic drill;

The optimization model building unit is used to determine the constraint conditions of the multi-objective function for the optimization of the hydraulic drill bit drilling parameters of the fishbone well, and establish the multi-objective optimization model of the hydraulic drill bit drilling parameters of the fishbone well according to the constraint conditions;

The optimization unit is configured to determine the drilling parameters of the fishbone well hydraulic drill according to the multi-objective optimization model of the fishbone well hydraulic drill bit, so as to realize the multi-objective optimization of the fishbone well hydraulic drill drilling parameters.

Technical effect of the present invention is:

The invention provides a multi-objective optimization method for the drilling parameters of a fishbone well hydraulic drill bit, which constructs a multi-objective function for the optimization of the hydraulic drill bit drilling parameters of a fishbone well, wherein the multi-objective function includes hydraulic parameters and structural parameters, and the fishbone well is established. The multi-objective optimization model of the drilling parameters of the spur well hydraulic drill can optimize the drilling parameters according to the constraint conditions, which has great flexibility and wide practicability.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention and the technical solutions in the prior art, the following will briefly introduce the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only For some embodiments of the present invention, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a kind of flow chart of multi-objective optimization method for drilling parameters of a fishbone well hydraulic drill bit proposed by the present invention;

Fig. 2 is a composition block diagram of a multi-objective optimization device for drilling parameters of a fishbone well hydraulic drill proposed by the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings of the embodiments of the present invention. Apparently, the described embodiments are some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without any creative efforts fall within the protection scope of the present invention.

As shown in Figure 1, it is a flow chart of a multi-objective optimization method for hydraulic drill bit drilling parameters in a fishbone well. include:

S10, constructing a multi-objective function for optimizing the drilling parameters of the fishbone well hydraulic drill bit, wherein the multi-objective function includes hydraulic parameters and structural parameters.

The fishbone well hydraulic drill bit involved in the present invention comprises a rotating abrasive jet nozzle, an impeller and an impeller bushing. The main factors affecting the rock-breaking efficiency of abrasive jets are hydraulic parameters (including pump pressure and nozzle size) and structural parameters. Among them, the structural parameters are mainly the impeller parameters of the nozzle, including the mouth angle of the impeller and the number of blades.

The multi-objective function for designing the optimization of the drilling parameters of the hydraulic drill bit in the fishbone well is:

F(x)＝α ₁ f ₁ (x)+α ₂ f ₂ (x),

Among them, f ₁ (x) is a hydraulic parameter, f ₂ (x) is a structural parameter; α ₁ and α ₂ are the weight values of each function, and α ₁ +α ₂ =1.

In the design of structural parameters, since the impeller and the impeller bushing are connected together through interference fit, if the interference is too large, it will easily cause assembly difficulties, and even the impeller will be deformed when it is pressed into the impeller bushing; If the margin is too small, the impeller will easily fall off during downhole jet drilling. Therefore, it is very important to select a suitable margin.

The calculation formula of the minimum interference amount δ _min is:

δ _min = e _α min + e _{i min} ;

Among them, _{e αmin} is the minimum diameter change required when the containing part in the inner hole of the impeller bushing can withstand the axial pressure; When the force is input, the minimum diameter change required;

The formula for calculating the maximum interference amount δ _max is:

δ _max = e α _max + e _{i max} ;

Among them, e _αmax is the maximum allowable diameter variation of the containing part in the inner hole of the impeller bushing without plastic deformation; e _{i max} is the maximum allowable diameter variation of the contained part of the impeller without plastic deformation .

In the design of hydraulic parameters, the size of the nozzle in the hydraulic parameters is determined according to the drilling design parameters and the formation soil parameters in the operation area. As an example, the nozzle is made of YG6 hard alloy, and the nozzle outlet diameter is 3mm. The diameter of the mouth can also be 1.5mm, 2mm, 2.5mm, 4mm, 5mm or 6mm.

S20. Determine the constraint conditions of the multi-objective function for the optimization of the drilling parameters of the fishbone well hydraulic drill, and establish a multi-objective optimization model of the fishbone well hydraulic drill drilling parameters according to the constraint conditions.

According to the constraints, an initial population P(t) is randomly generated, where t is the current evolutionary generation, t∈[0,t _max ]. When t is zero, it is to produce a population, and t _max is the maximum evolution parameter. Obtain the individual fitness value in P(t) according to the multi-objective function optimized for the hydraulic drill bit drilling parameters of the fish bone spur well, judge whether the termination condition is satisfied according to the genetic algorithm termination criterion, if t>t _max , then output the optimized fish The drilling parameters of the spur well hydraulic drill; otherwise, select the operation according to the adaptation progress to obtain the winning individual.

S30. Determine the hydraulic drill drilling parameters of the fishbone well according to the multi-objective optimization model of the hydraulic drill bit for the fishbone well, so as to realize the multi-objective optimization of the hydraulic drill bit for the fishbone well.

A multi-objective optimization device for drilling parameters of a fishbone well hydraulic drill bit proposed by the present invention is shown in FIG. 2 . include:

The multi-objective function establishment unit 201 is used to construct the multi-objective function for optimizing the drilling parameters of the fishbone well hydraulic drill bit;

The optimization model building unit 202 is used to determine the constraint conditions of the multi-objective function for the optimization of the hydraulic drill bit drilling parameters of the fishbone well, and establish a multi-objective optimization model of the hydraulic drill bit drilling parameters of the fishbone well according to the constraint conditions;

The optimization unit 203 is configured to determine the hydraulic drill drilling parameters of the fishbone well according to the multi-objective optimization model of the hydraulic drill drilling parameters of the fishbone well, so as to realize the multi-objective optimization of the hydraulic drill drilling parameters of the fishbone well.

The invention provides a multi-objective optimization method for the drilling parameters of a fishbone well hydraulic drill bit, which constructs a multi-objective function for the optimization of the hydraulic drill bit drilling parameters of a fishbone well, wherein the multi-objective function includes hydraulic parameters and structural parameters, and the fishbone well is established. The multi-objective optimization model of the drilling parameters of the spur well hydraulic drill can optimize the drilling parameters according to the constraint conditions, which has great flexibility and wide practicability.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (8)

1. a kind of fishbone well waterpower drill bit drilling parameter Multipurpose Optimal Method, which is characterized in that including

The multiple objective function of fishbone well waterpower drill bit drilling parameter optimization is constructed, wherein the multiple objective function includes waterpower ginseng Several and structural parameters；

The constraint condition for determining the multiple objective function of the fishbone well waterpower drill bit drilling parameter optimization, builds according to constraint condition Found the fishbone well waterpower drill bit drilling parameter Model for Multi-Objective Optimization；

Determine that the fishbone well waterpower drill bit bores according to the fishbone well waterpower drill bit drilling parameter Model for Multi-Objective Optimization Into parameter, to realize the fishbone well waterpower drill bit drilling parameter multiple-objection optimization.

2. the fishbone well waterpower drill bit drilling parameter Multipurpose Optimal Method according to claim 1, which is characterized in that institute Stating fishbone well waterpower drill bit includes rotary abrasive jet nozzle, impeller and impeller buss.

3. the fishbone well waterpower drill bit drilling parameter Multipurpose Optimal Method according to claim 1, which is characterized in that institute Stating the multiple objective function that fishbone well waterpower drill bit drilling parameter optimizes is：

F (x)=α₁f₁(x)+α₂f₂(x), wherein f₁It (x) is hydraulic parameters, f₂It (x) is structural parameters；α₁、α₂For each function weight Value, α₁+α₂=1.

4. the fishbone well waterpower drill bit drilling parameter Multipurpose Optimal Method according to claim 3, which is characterized in that institute Stating structural parameters includes minimum interference amount δ_min, maximum interference amount δ_max, calculation formula is：

5. the fishbone well waterpower drill bit drilling parameter Multipurpose Optimal Method according to claim 4, which is characterized in that institute State minimum interference amount δ_minCalculation formula be：

δ_min=e_{α min}+e_{i min}；

Wherein, e_{α min}For the external member of the impeller buss inner hole be able to bear from be axially forced to power when required minimum it is straight Diameter variable quantity；e_{i min}For the internal member of the impeller be able to bear from be axially forced to power when, required minimum diameter becomes Change amount；

The maximum interference amount δ_maxCalculation formula be：

δ_max=e_{α max}+e_{i max}；

Wherein, e_{α max}The maximum gauge allowed when plastic deformation variation is not generated for the external member of the impeller buss inner hole Amount；e_{i max}The maximum gauge variable quantity allowed when plastic deformation is not generated for the internal member of the impeller.

6. the fishbone well waterpower drill bit according to claim 1 creeps into hydraulic parameters Multipurpose Optimal Method, feature exists In the multiple objective function of the construction fishbone well waterpower drill bit drilling parameter optimization, wherein the multiple objective function includes water Force parameter and structural parameters specifically include, and the stratum Soil Parameters according to Drilling Design parameter and operating area determine the waterpower The size of nozzle in parameter.

7. the fishbone well waterpower drill bit according to claim 1 creeps into hydraulic parameters Multipurpose Optimal Method, feature exists In, the constraint condition include bit pressure constraint condition, revolving speed constraint condition, bit wear amount constraint condition, drilling depth constraint condition, Rate of penetration constraint condition.

8. a kind of fishbone well waterpower drill bit drilling parameter multiple-objection optimization device, which is characterized in that including：

Multiple objective function establishes unit, for constructing the multiple objective function of fishbone well waterpower drill bit drilling parameter optimization；

Optimized model establishes unit, the pact of the multiple objective function for determining the fishbone well waterpower drill bit drilling parameter optimization Beam condition establishes fishbone well waterpower drill bit drilling parameter Model for Multi-Objective Optimization according to the constraint condition；

Optimize unit, for determining the fish bony spur according to the fishbone well waterpower drill bit drilling parameter Model for Multi-Objective Optimization Well water power drill bit drilling parameter, to realize fishbone well waterpower drill bit drilling parameter multiple-objection optimization.