新疆石油地质

新疆石油地质 ›› 1998, Vol. 19 ›› Issue (2): 165-168.

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川南碳酸盐岩缝洞中隐蔽性天然气储量早期预测———“排水找气”井储量早期估算探讨

董荣祥, 黎永杰, 毛川勤   

  1. 四川石油管理局川南矿区科研所 泸州 646001
  • 收稿日期:1996-05-26 出版日期:1998-04-01 发布日期:2020-11-15
  • 作者简介:董荣祥：工程师 石油地质

EARLY PREDICTION OF CONSEALED GAS IN PLACE FOR FRACTURE-VUGGY CARBONATE ROCK IN SOUTHERN SICHUAN—An Example of Early Estimation and Discussion of Gas in Place from a “Water Discharge to Yield Gas" Well

Dong Rongxiang, Li Yongjie, Mao Chuanqin   

  1. Research Institute of Southern Sichuan Field, Sichuan Petroleum Administration Bureau, Luzhou, Sichuan 646001
  • Received:1996-05-26 Online:1998-04-01 Published:2020-11-15
  • About author:Dong Rongxiang, Engineer, Petroleum Geology

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摘要： 关于封闭性碳酸盐岩缝洞气藏天然气储量计算, 已有公认的经典计算公式, 而探讨缝洞性碳酸盐岩产水圈闭中隐蔽性天然气储量的预测和计算, 尚属近年提出的新课题。根据物质平衡原理, 推导了这类隐蔽性天然气储量计算公式, 并提出“折算气量”新概念,建立气水同产井P/Z—ΣGp关系压降图。运用该压降图,也可早期预测产水井中隐蔽性天然气储量。通过H16 井储量计算实例,得到了证实。

关键词: 四川, 碳酸盐岩, 裂缝, 溶洞, 隐蔽圈闭, 天然气储量, 预测

Abstract: About estimation of gas in place for gas reservoirs as confined fracture-vuggy carbonate, some generally recognized classical formulas were available before.But prediction and estimation of consealed gas in place from water-gas producers within a fracture-vuggy carbonate trap is a new challenge in recent years, Based on material balance priciple, such formulas are deduced, a new concept of “discounted gas concentration"is presented in this paper, and pressure drawdown diagram of P/Z vs Gp for water-gas producer is established by which prediction of consealed gas in place for water producers can also be made.This technique has been verified from the case estimation of Well H16.

Key words: Carbonate rock, Fracture, Cave, Subtle trap, Gas Reserve, Prediction