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Method and device for predicting development effect of shale gas well

A development effect, shale gas well technology, applied in the field of oil and gas exploration and development, can solve problems such as inability to apply, and achieve the effect of avoiding necessity and wide applicability

Pending Publication Date: 2022-01-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, it cannot be applied to new areas or peripheral areas in the initial stage of exploration and with a low degree of research.

Method used

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  • Method and device for predicting development effect of shale gas well
  • Method and device for predicting development effect of shale gas well
  • Method and device for predicting development effect of shale gas well

Examples

Experimental program
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Effect test

Embodiment 1

[0070] figure 1 A flow chart of a method for predicting the development effect of a shale gas well according to an embodiment of the present invention is shown. figure 2 A schematic diagram showing a slope obtained by a diffusion model based on desorbed gas volume and desorbed time in a method for predicting the development effect of shale gas wells according to an embodiment of the present invention.

[0071] combine figure 1 with figure 2 As shown, the prediction method for the development effect of shale gas wells includes:

[0072] Step 1: Obtain the mud density and mud circulation temperature when the full-diameter core of the shale gas coring well is taken;

[0073] Step 2: Collect the desorbed gas volume of the full-diameter core of the shale gas coring well at the mud circulation temperature;

[0074] Step 3: Establish a diffusion model of desorption gas volume and desorption time, and obtain a unified diffusion equation;

[0075] Among them, the unified diffusi...

Embodiment 2

[0099] image 3 A block diagram of a device for predicting the development effect of shale gas wells according to an embodiment of the present invention is shown.

[0100] Such as image 3 As shown, the prediction device for the development effect of shale gas wells includes:

[0101] The mud density detection device 102 is used to obtain the mud density when the full-diameter core of the shale gas coring well is taken;

[0102] The on-site desorption instrument 104 collects the desorption gas volume of the full-diameter core of the shale gas coring well at the mud circulation temperature;

[0103] Processor 106, the processor is connected with the on-site desorption instrument, and the processor performs the following steps: establish a diffusion model of desorption gas volume and desorption time, and obtain a unified diffusion equation; The Darcy seepage rate of free gas along the shale bedding fractures during coring of diameter cores; based on the mud density and Darcy ...

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Abstract

The invention discloses a method and device for predicting the development effect of a shale gas well. The method comprises the following steps: obtaining slurry density and a slurry circulation temperature during a shale gas coring well full-diameter core coring process; collecting a desorption gas amount of the full-diameter rock core of the shale gas coring well at the slurry circulation temperature; establishing a diffusion model of desorption gas capacity and desorption time, and obtaining a unified diffusion equation; on the basis of the unified diffusion equation, calculating a rate of Darcy flow of free gas along a shale bedding fracture in the shale gas coring well full-diameter core coring process; based on the slurry density and the rate of Darcy flow, calculating a development effect evaluation coefficient. The invention can effectively avoid the necessity of long-term productivity data of the shale gas well, is suitable for shale gas wells in a low-exploration-degree region, has instantaneity in the application on the exploration of new regions, can provide first-time reference data, is also suitable for exploration of the shale gas wells in a mature region, and is a prediction method that is rapid, effective, convenient, and widely applicable.

Description

technical field [0001] The invention belongs to the technical field of oil and gas exploration and development, and in particular relates to a method and device for predicting the development effect of shale gas wells. Background technique [0002] The prediction of shale gas well development effect is usually a kind of reservoir development engineering experience technology, based on the combined analysis of the productivity data of existing shale gas wells, and the calculation of the future production data of shale gas wells, so as to predict its development effect and finally evaluate its production reserves . [0003] At present, the commonly used methods are ARPS (decreasing development) model, SEDM (structural equation) model and Duong (production decline) model, which use the yield decay with time. On this basis, Pang Wei et al. (2017) used the measured data of shale gas wells to construct a log-logarithmic decay model; Yang Yunfeng (2017) calculated the production d...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q50/02
CPCG06Q10/04G06Q50/02
Inventor 徐二社范明张文涛李志明申宝剑刘伟新
Owner CHINA PETROLEUM & CHEM CORP
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