“Extreme utilization”development theory of unconventional natural gas  

作　　者：MA Xinhua 

机构地区：[1]PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China [2]National Energy Shale Gas R&D(Experiment)Center,Hebei 065007,China

出　　处：《Petroleum Exploration and Development》2021年第2期381-394,共14页石油勘探与开发（英文版）

基　　金：Supported by the China National Science and Technology Major Project(2017ZX05035,2016ZX05037)。

摘　　要：In the process of unconventional natural gas development practice,the"extreme utilization"concept that focuses on"continuously breaking through the limit of development technology"is gradually formed,and supports the scale benefit exploration of unconventional gas in China.On this basis,the development theory of"extreme utilization"is proposed,its theoretical connotation together with development technologies of unconventional natural gas are clarified.The theoretical connotation is that,aiming at"extreme gas reservoirs","extreme techniques"are utilized to build subsurface connected bodies,expand the discharge area,and enlarge the production range,to obtain the maximum single-well production,extreme recovery,and eventually achieve the"extreme effect"of production.The series of development technologies include micro/nano-scale reservoir evaluation,"sweet spot"prediction,unconventional percolation theory and production capacity evaluation,optimization of grid well pattern,optimal-fast drilling and volume fracturing,and working regulation optimization and"integrated"organizing system.The"extreme utilization"development theory has been successfully applied in the development of unconventional gas reservoirs such as Sulige tight gas,South Sichuan shale gas,and Qinshui coalbed methane.Such practices demonstrate that,the"extreme utilization"development theory has effectively promoted the development of unconventional gas industry in China,and can provide theoretical guidance for effective development of other potential unconventional and difficult-to-recovery resources.

关 键 词：unconventional natural gas extreme gas reservoir extreme development theory of extreme utilization subsurface connected body production capacity evaluation grid well pattern drainage and extraction optimization 

分 类 号：TE37[石油与天然气工程—油气田开发工程]