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A development method and well type selection method for a multi-layer superimposed tight gas reservoir

A technology for tight gas and gas reservoirs, applied in the direction of production fluid, earthwork drilling and production, wellbore/well components, etc., can solve problems such as shortage, systematic evaluation of horizontal well development effects, etc., and achieve the effect of increasing production and recovery

Active Publication Date: 2022-07-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a lack of a complete evaluation system for the development effect of horizontal wells, and no systematic evaluation of the development effect of horizontal wells, and how to economically and effectively increase the production and The recovery factor has become the primary goal of the efficient development of the natural gas industry

Method used

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  • A development method and well type selection method for a multi-layer superimposed tight gas reservoir
  • A development method and well type selection method for a multi-layer superimposed tight gas reservoir
  • A development method and well type selection method for a multi-layer superimposed tight gas reservoir

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Effect test

Embodiment 1

[0059] In this example, the development effect of the middle-shallow multilayer superimposed tight gas reservoir in a certain area is analyzed, such as figure 1 As shown, the method for developing a multilayer stacked tight gas reservoir in this embodiment includes the following steps:

[0060] A. According to the sand thickness and distribution characteristics of the reservoir, classify the reservoir types of the multi-layered tight gas reservoirs;

[0061] B. Carry out dynamic analysis of gas reservoir production, compare the dynamic indicators of vertical wells and horizontal wells in gas reservoirs, and clarify dynamic differences;

[0062] C. Analyze the reasons for dynamic differences and study the main control factors affecting the productivity of horizontal wells;

[0063] D. Carry out the feasibility analysis of multi-layer commingled production technology, and clarify the multi-layer commingled production boundary of vertical wells;

[0064] E. Forming the conclusi...

Embodiment 2

[0097] like Figure 1 to Figure 5 As shown, according to the method for developing a multi-layered tight gas reservoir described in Embodiment 1, in this embodiment, a vertical well multi-layered commingled production limit analysis is carried out in step D, and a dual-layer commingled production is established by numerical simulation technology according to the gas reservoir physical properties, temperature and pressure systems. A homogeneous gas reservoir model with no channeling in layers, the burial depth is 2300m at the base of the model, the porosity is 0.1076, and the permeability is 0.19×10 -3 μm 2 , the vertical permeability is zero, the effective thickness of the reservoir is 10 meters, the original formation pressure is 42.3MPa, and the numerical calculation grid is 30×30×3. In the model, only the upper and lower layers are the target layers, and the middle is the impermeable barrier. layer, the total model reserves are 1.43×10 8 m 3, given that the combined prod...

Embodiment 3

[0111] Based on the development methods for multi-layer stacked tight gas reservoirs described in Embodiments 1 and 2, this embodiment provides a well type selection method. Based on the development effects of horizontal wells in different reservoirs, the well type adaptability evaluation is carried out, and then the The suitable well types for three types of reservoirs are selected:

[0112] Type I reservoir: both horizontal wells and vertical wells are suitable, but vertical wells are more economical; H≥23m, K≥0.11m, S w ≤50%;

[0113] Type II reservoir: some suitable for vertical wells, some suitable for horizontal wells; H: 16-20m, K≥0.15mD, S w ≤54%, horizontal well should be used; H: 20-23m, K≥0.17mD, S w ≤54%, using vertical wells;

[0114] Type III reservoir: horizontal wells can be used for development in a few areas; H: 10-16m, K≥0.2mD, S w ≤58%, using horizontal well development;

[0115] Among them, H is the effective thickness, K is the permeability, S w is ...

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Abstract

The invention discloses a multi-layer stacked tight sandstone gas reservoir development technology. The method for developing a multi-layer stacked tight gas reservoir of the present invention includes the following steps: according to the sand thickness and distribution characteristics of the reservoir, classifying the reservoir types of the multi-layer stacked tight gas reservoir; Dynamic indicators of horizontal wells to clarify dynamic differences; to analyze the reasons for dynamic differences, to study the main control factors affecting the productivity of horizontal wells; to analyze the feasibility of multi-layer commingled production technology, to clarify the boundaries of vertical wells and multi-layer commingled production; in conclusion. The development method can clarify the favorable deployment areas, reasonable deployment methods and reasonable production systems of horizontal and vertical wells, form targeted development technical countermeasures, and realize a quantitative evaluation system for parameter screening of horizontal and vertical wells. The production and recovery factors of the reservoir provide data support.

Description

technical field [0001] The invention relates to a development technology for a multi-layer stacked tight sandstone gas reservoir, in particular to a development method for a multi-layer stacked tight gas reservoir and a well type selection method. Background technique [0002] Tight sandstone gas resources are abundant and widely distributed. About 70 basins have been discovered or speculated to develop tight gas in the world, with a resource of about 210×1012m 3 , distributed in the Asia-Pacific, North America, Latin America, the Soviet Union, the Middle East-North Africa and other regions, of which the Asia-Pacific, North America, and South America have tight gas resources accounting for more than 60% of the global tight gas resources. Tight sandstone gas reservoirs have been explored and developed for many years, and tight sandstone gas reservoirs have been discovered in the United States, Canada, Russia, China and other countries. Among them, the United States and Cana...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/02E21B43/30
CPCG06Q10/06393G06Q50/02E21B43/30E21B43/305
Inventor 刘成川王勇飞卜淘高伟刘露曹廷宽杨建曾宪兵袁霞张玉学甘文兵
Owner CHINA PETROLEUM & CHEM CORP
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