页岩气井产能表征方法研究

油气藏评价与开发 ›› 2019, Vol. 9 ›› Issue (5): 63-69.

页岩气井产能表征方法研究

刘华^1,²,王卫红^1,²,王妍妍^1,²,谷红陶³,金冰垚⁴

^1. 页岩油气富集机理与有效开发国家重点实验室,北京 100083
^2. 中国石化石油勘探开发研究院,北京 100083
^3. 中国石化华东油气分公司南川页岩气项目部,重庆 408400
^4. 中国石油大学（北京）,北京 102249

收稿日期:2019-07-02 发布日期:2019-10-26 出版日期:2019-10-26
作者简介:刘华（1972 —）,男,博士,高级工程师,从事页岩气渗流机理和气藏工程方面的研究。通讯地址：北京市海淀区学院路31号,邮政编码：100083。E-mail：liuhua2008. syky@sinopec.com
基金资助:
国家科技重大专项“彭水常压页岩气勘探开发示范工程”(2016ZX05061-013);中国石化科技部项目“川南深层页岩气开发气藏工程技术研究”(P17014);中国石化科技部十条龙项目“深层页岩气综合评价及开发技术政策”(P18058-1)

Productivity characterization method of shale gas wells

LIU Hua^1,²,WANG Weihong^1,²,WANG Yanyan^1,²,GU Hongtao³,JIN Bingyao⁴

^1. State Key Laboratory of Shale Oil and Gas Accumulation Mechanism and Effective Development, Beijing 100083, China
^2. Sinepec Petroleum Exploration and Production Research Institute, Beijing 100083, China
^3. Nanchuan Shale Gas Project Department, Sinopec East China Oil and Gas Company, Chongqing 408400, China
^4. China University of Petroleum（Beijing）, Beijing 102249, China

Received:2019-07-02 Online:2019-10-26 Published:2019-10-26

摘要/Abstract

摘要：

常规气藏气井的产能主要用无阻流量作为衡量指标,通过试气、试采资料确定无阻流量,评价气井产能。页岩气由于地质特征和渗流机理的特殊性,用什么指标表征页岩气井的产能存在争议。结合国内实际页岩气井的测试与生产资料,提出不同开发阶段页岩气井的产能可以用无阻流量、可采储量和产气量三类指标进行表征。用无阻流量表征页岩气井产能时,建立了涪陵主体区“一点法”经验公式,产能系数α值为0.25。针对多工作制度的产能测试,多流量法在涪陵具有较好的适应性。用可采储量表征页岩气井产能时,在页岩气井进入递减阶段之前选用页岩气压裂水平井非稳态产能评价方法,进入递减阶段后采用经验递减法预测页岩气井的可采储量。对于定产生产的页岩气井,可以优选相同油嘴下的试气产量表征页岩气井产能。研究成果为页岩气井生产动态分析及开发技术政策制定奠定了基础。

关键词: 页岩气, 产能评价, 无阻流量, 可采储量, 经验递减分析

Abstract:

The productivity of gas wells in conventional gas reservoirs is mainly measured by open flow rate. The open flow rate is determined by gas test and production test data to evaluate the productivity of gas wells. Because of the particularity of geological characteristics and seepage mechanism, it is controversial to use which indexes to characterize the productivity of shale gas wells. Combined with the testing and production data of actual shale gas wells in China, it is proposed that the productivity of shale gas wells in different development stages can be characterized by three kinds of indexes—unhindered flow rate, recoverable reserves and gas production. When the productivity of shale gas wells is characterized by open flow, the empirical formula of “one point method” in Fuling main area is established, and the reservoir capacity（α） is 0.25. For the production capacity test of multiple work systems, the multi-flow method has better adaptability in Fuling. When the productivity of shale gas wells is characterized by recoverable reserves, before shale gas wells enter the decline stage, the unsteady productivity evaluation method of shale gas fractured horizontal wells is selected; while after entering the decline stage, the recoverable reserves of shale gas wells can be predicted by empirical decline method. For shale gas wells with fixed production, the gas test production of the same oil nozzle can be optimized to characterize the productivity of shale gas wells. The research results lay a foundation for the dynamic analysis of shale gas well production and the formulation of development technology policy.

Key words: shale gas, productivity evaluation, open flow, recoverable reserves, empirical decline analysis

中图分类号:

TE37

刘华,王卫红,王妍妍等. 页岩气井产能表征方法研究[J]. 油气藏评价与开发, 2019, 9(5): 63-69.

Hua LIU,Weihong WANG,Yanyan WANG, et al. Productivity characterization method of shale gas wells[J]. Reservoir Evaluation and Development, 2019, 9(5): 63-69.

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井号	α	二项式评价结果/ （10⁴ m³·d^-1）	“一点法”（12 mm油嘴）评价结果/（10⁴ m³·d^-1）
A1	0.32	58.82	59.91
A2	0.25	56.57	58.93
A3	0.26	43.17	43.28
A4	0.18	92.58	100.22
A5	0.25	63.73	69.10
平均值	0.25	61.40	63.79