Petroleum Exploration and Development >

0 20221203 - 20221203

DOI: https://doi.org/10.11698/PED.20220159

“Extreme utilization” development practice of deep shale gas in southern Sichuan Basin

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  • 1. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
    2. National Energy Shale Gas R & D (Experiment) Center, Hebei 065007, China;
    3. Gas Field Development Management Department of PetroChina Southwest Oil and Gas Field Company, Sichuan 610051, China

Received date: 2022-03-04

  Revised date: 2022-09-06

  Online published: 2022-09-26

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Abstract

To efficiently develop deep shale gas in southern Sichuan Basin, under the guidance of “extreme utilization” theory, a basic idea and solutions for deep shale gas development are put forward. In view of multiple influencing factors of shale gas development, low production and marginal profit of wells in this region, the basic idea is to establish transparent geological body of the block in concern, evaluate the factors affecting shale gas development through integrated geological-engineering research and optimize the shale gas development of wells in their whole life cycle to balance the relationship between production objectives and development costs. The solutions are as follows: (1) calculate the gold target index, the location of horizontal well drilling target is pinpointed, and shale reservoirs are depicted accurately by geophysical and other means to build underground transparent geological body; (2) optimize the drilling and completion process, improve the adaptability of key tools by cooling, reducing density and optimizing the performance of drilling fluid, after a development well is built, the corresponding "man-made gas reservoir" is built by comprehensively considering the characteristics of in-situ stress and fractures of the well; (3) through efficient management, establishment of learning curve and optimization of drainage and production regime, the development quality and efficiency of the well are improved across its whole life cycle, to fulfil “extreme utilization” development of shale gas. The practice of the idea and solutions shows that the EUR of single wells in southern Sichuan Basin increase by 10%-20% than last year.

Key words： unconventional natural gas; deep shale gas; extreme utilization theory; underground connected body; gold target index; drainage and production optimization

Cite this article

MA Xinhua, WANG Hongyan, ZHAO Qun, LIU Yong, ZHOU Shangwen, HU Zhiming, XIAO Yufeng . “Extreme utilization” development practice of deep shale gas in southern Sichuan Basin[J]. Petroleum Exploration and Development, 0 : 20221203 -20221203 . DOI: 10.11698/PED.20220159

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