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A method and system for determining the coincidence rate between actual drilling and design well

A determination method and drilling technology, applied in design optimization/simulation, calculation, instrumentation, etc., can solve the problems of low coincidence rate and lack of evaluation methods in a certain well, and achieve quantification, reduce subjective judgment, and scientific evaluation Effect

Active Publication Date: 2018-09-28
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

At present, the evaluation of the coincidence rate between the actual drilling and the designed well is in a "qualitative" stage as a whole. During on-site acceptance, the results are given qualitatively based on the personal experience of the acceptance personnel, for example: "a certain well has a high coincidence rate", "a certain well The coincidence rate of one well is not bad", "the coincidence rate of a certain well is low", etc., lacking a set of scientific and reasonable evaluation methods to clearly give a "quantitative" result

Method used

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  • A method and system for determining the coincidence rate between actual drilling and design well
  • A method and system for determining the coincidence rate between actual drilling and design well
  • A method and system for determining the coincidence rate between actual drilling and design well

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Embodiment Construction

[0039] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0040] According to the drilling engineering design and actual drilling data, the present invention determines the evaluation items and element values ​​of the actual drilling and design wells, sets the weight value according to the importance of the evaluation items, calculates the membership degree of the first-level evaluation item elements through the membership degree function and constructs a fuzzy Calculate the closeness of the fuzzy vectors of each corresponding evaluation item, and calculate the total closeness of the comparison items according to the weight value of each comparison item in the item weight module as the coincidence rate between the actual drilling and the design well.

[0041] Take the HH96P10 well of a certain company's Honghe Oilfield as an example to describe in detail the process of determining the coincidence ra...

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Abstract

The invention relates to a coincidence rate determining method and system of a really drilled well and a designed well belonging to the petroleum and natural gas drilling technical filed. The method comprises following steps: determining comparison items and element values thereof of the really drilled well and the designed well according to drilling engineering design and real drilling data; setting weight values according to the significances of the comparison items; calculating and evaluating item element subordinating degrees through a subordinating degree function and constructing fuzzy vectors; calculating the close degrees of the fuzzy vectors of corresponding comparison items; and calculating the total close degree of the comparison items according to the weight values of the comparison items in an item weight module. According to the method and the system of the invention, the coincidence rate of the really drilled well and the designed well is described according to the close degrees of the fuzzy vectors; the evaluation quantification is realized; the artificial subject judgment is reduced; the evaluation is more scientific; and the method and the system have very important significance in drilling post-evaluation.

Description

technical field [0001] The invention relates to a method and a system for determining the coincidence ratio between actual drilling and designed wells, and belongs to the technical field of oil and gas drilling. Background technique [0002] In the field of oil and gas drilling technology, drilling engineering design plays a very important role. It is to know the standards of on-site drilling operations and guide the operation. Drilling complications may occur. At present, the drilling engineering design is generally prepared according to the drilling geological design, combined with the actual drilling data of adjacent wells, and the drilling industry specifications. According to my country's oil and gas industry standard SY / T 5333-2012 "Drilling Engineering Design Format", the drilling engineering design mainly includes Design, wellbore trajectory design, drilling fluid design, health, safety and environmental protection (HSE) design, drilling quality requirements and dril...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/13G06F30/20
Inventor 闫吉曾
Owner CHINA PETROLEUM & CHEM CORP
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