Method and device for prediction while drilling of gas reservoir output

A gas layer and production technology, applied in surveying, earthmoving, wellbore/well components, etc., can solve the problems of high degree of mastery, difficult to obtain, multi-parameter calculation, etc. Drilling cost, the effect of expanding the scope of application

Active Publication Date: 2018-01-19
SINOPEC SSC +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Disadvantages: This method mainly assumes that the formation is homogeneous and the fluid is single-phase seepage, and is generally performed after obtaining well data
Disadvantages: This method lacks a reasonable geological model, and requires abundant reservoir, fluid, and dynamic data as support, and there are many evaluation parameters involved in the simulation, which are difficult to obtain in the early stage of development
[0005] The physical simulation method is closer to the real reservoir, can intuitively understand the productivity of the reservoir, the distribution of fluid potential and seepage field, an

Method used

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  • Method and device for prediction while drilling of gas reservoir output
  • Method and device for prediction while drilling of gas reservoir output
  • Method and device for prediction while drilling of gas reservoir output

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Embodiment 1

[0101] Such as figure 1 As shown, a method for predicting gas layer production while drilling according to the present invention, the production is natural gas production, comprising the following steps:

[0102] Step S11: According to the data of the drilled gas layer, a gas layer production prediction model is established.

[0103] Step S12: Using the data of the gas layer being drilled, the production of the gas layer being drilled is predicted according to the established gas layer production prediction model, and the potential productivity of the drilling gas layer is analyzed.

[0104] It is worth noting that the data of the gas layer that has been drilled is the drilling depth, drilling time, gas full hydrocarbon detection value, gas layer depth data, gas layer cumulative production and the gas full hydrocarbon detection value of the marker layer; the drilling gas layer The data are drilling depth, drilling time, gas full hydrocarbon detection value, gas layer depth da...

Embodiment 2

[0106] Such as Figure 2-10 As shown, another method of predicting gas layer production while drilling of the present invention, said production is natural gas production, comprises the following steps:

[0107] Step 21: Analyze the data of the gas layer that has been drilled, and process the abnormal value. The data of the gas layer that has been drilled refers to the drilling depth, drilling time, gas full hydrocarbon detection value and cumulative production of the gas layer. The processing abnormal value refers to the Drilling time values ​​that are greater than 2 times the average value of the interval or less than 0.5 times the average value are treated as abnormal values, replaced by adjacent normal values, and the gas full hydrocarbon detection values ​​that are greater than 2 times the average value of the interval are analyzed. deal with.

[0108] Step 22: According to the data of the drilled gas layer, establish a gas layer production prediction model, the gas laye...

Embodiment 3

[0236] Such as Figure 11 As shown, a device for predicting gas layer production while drilling according to the present invention, said production is natural gas production, comprising:

[0237] Prediction model building module 31, used to establish a gas layer production prediction model according to the data of the gas layer that has been drilled;

[0238]The predictive analysis module 32 is configured to use the data of the gas layer being drilled to predict the production of the gas layer being drilled and analyze the potential productivity of the gas layer being drilled according to the established gas layer production prediction model.

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Abstract

The invention belongs to the technical field of oil and gas exploration and development, and particularly relates to a method and device for prediction while drilling of gas reservoir output. The method for prediction while drilling of the gas reservoir output, namely the natural gas output, comprises the steps of establishing a gas reservoir output prediction model according to gas reservoir dataof a drilled well; predicting the gas reservoir output of a drilling well according to the established gas reservoir output prediction model through the gas reservoir data of the drilling well; and analyzing the potential capacity of the drilling well. The device for prediction while drilling of the gas reservoir output comprises a prediction model establishing module and a prediction analysis module. The natural gas content in broken rock is recovered through the drilling data, logging data and the like, the recoverable gas content index is figured out, and on this basis, the well natural gas output is predicted according to the total volume of a reservoir stratum within the gas production radius range. The method can be applied to assessment of the overall mining potential of the natural gas drilling well and a gas reservoir in the development stage and provides a basis for completion program design and gas production engineering ground construction.

Description

technical field [0001] The invention belongs to the field of exploration and development of oil and natural gas, and in particular relates to a method and a device for predicting gas layer production while drilling. Background technique [0002] Gas logging is a mud logging method that uses a gas detection system or detects and analyzes the content of hydrocarbon gases separated from drilling fluid through a drilling fluid degasser at a certain period of time. The gas measurement value is the continuous detection of the hydrocarbon gas content in the drilling fluid by the gas logging equipment according to a certain analysis period. It reflects the gas content in the pores of the broken rock per unit time, and is the earliest and most intuitive reflection of the gas layer production. [0003] At present, there are several traditional production capacity evaluation methods: the analytical method mainly uses highly abstract physical models, and calculates through the law of de...

Claims

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Application Information

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IPC IPC(8): E21B49/00E21B47/00
Inventor 董昭雄程豪华杜志锋李三明吴早平张云翠姜海申杨礼明付航
Owner SINOPEC SSC
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