页岩气储层可压裂性级别测井评价及展布特征——以川南X地区五峰组—龙马溪组为例

doi:10.12108/yxyqc.20210319

岩性油气藏 ›› 2021, Vol. 33 ›› Issue (3): 177–188.doi: 10.12108/yxyqc.20210319

• 石油工程 • 上一篇

页岩气储层可压裂性级别测井评价及展布特征——以川南X地区五峰组—龙马溪组为例

丛平^1,2, 闫建平^1,2,3, 井翠⁴, 张家浩⁴, 唐洪明^1,2, 王军⁵, 耿斌⁵, 王敏⁵, 晁静⁵

1. 油气藏地质及开发工程国家重点实验室·西南石油大学, 成都 610500;
2. 西南石油大学地球科学与技术学院, 成都 610500;
3. 中国地质大学构造与油气资源教育部重点实验室, 武汉 430074;
4. 四川长宁天然气开发有限责任公司, 成都 610051;
5. 中国石化胜利油田分公司勘探开发研究院, 山东东营 257015

收稿日期:2020-07-09 修回日期:2020-11-15 发布日期:2021-06-04
通讯作者: 闫建平(1980-),男,博士,教授,主要从事测井地质学、岩石物理及非常规储层测井评价方面的教研工作。Email:yanjp_tj@163.com。 E-mail:yanjp_tj@163.com。
作者简介:丛平（1993—），女，西南石油大学在读硕士研究生，研究方向为测井地质学。地址：（610500）四川省成都市新都区西南石油大学地球科学与技术学院。Email：751802597@qq.com
基金资助:
中国石油-西南石油大学创新联合体科技合作项目“川南深层与昭通中浅层海相页岩气规模效益开发关键技术研究”（编号：2020CX-020000），“构造与油气资源”教育部重点实验室开放基金项目“湖相页岩油储层微-纳米孔隙结构及有效性测井解释方法”（编号：TPR-2018-08）联合资助

Logging evaluation and distribution characteristics of fracturing grade in shale gas reservoir: A case study from Wufeng Formation and Longmaxi Formation in X area, southern Sichuan Basin

CONG Ping^1,2, YAN Jianping^1,2,3, JING Cui⁴, ZHANG Jiahao⁴, TANG Hongming^1,2, WANG Jun⁵, GENG Bin⁵, WANG Min⁵, CHAO Jing⁵

1. State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China;
2. School of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, China;
3. Key Laboratory of Tectonics and Petroleum Resources, Ministry of Education, China University of Geosciences, Wuhan 430074, China;
4. Sichuan Changning Natural Gas Development Company Limited, Chengdu 610051, China;
5. Research Institute of Exploration and Development, Sinopec Shengli Oilfield Company, Dongying 257015, Shandong, China

Received:2020-07-09 Revised:2020-11-15 Published:2021-06-04

摘要/Abstract

摘要： 页岩气储层致密、非均质性强，在开发中须要压裂改造，准确地评价其可压裂性及其展布规律对压裂设计意义重大。以川南X地区五峰组-龙一段1亚段（龙一₁）页岩地层为研究对象，以岩心测试，测录井等资料为基础，分析了反映可压裂性的指标，提取脆性指数、泊松比、杨氏模量、抗拉强度和水平主应力差为敏感参数，以层次分析法求出各自权重，构建了综合可压裂系数I_cr；结合生产资料划分了Ⅰ，Ⅱ和Ⅲ级可压裂级别；开展多井可压裂级别评价与连井剖面对比，统计Ⅰ，Ⅱ级的地层厚度比，分析平面上可压裂性的变化规律。结果表明：I_cr≥0.59时，可压裂级别为Ⅰ级，可压裂性最好；五峰组-龙一₁¹、龙一₁²中Ⅰ级层段占比较大，是适合压裂开发的有利层段；Ⅰ级层段厚度比为0.8~0.9主要分布在N201，N209，N203，N208和N211井等井区。该研究成果为川南X地区页岩气储层水平井的部井开发提供了依据。

关键词: 页岩气, 可压裂性, 测井评价, 脆性指数, 层次分析法, 川南地区

Abstract: Shale gas reservoir is characterized by tightness and strong heterogeneity，so fracturing is needed to increase production and transformation. Therefore，the evaluation of shale fracturing grade and its distribution rule are of great guiding significance for the fracturing design. The shale formation of Wufeng Formation-Longyi₁ submember in X area，southern Sichuan Basin，was taken as the research object，based on the data of core test， logging and mud logging，the indexes reflecting shale fracturing were qualitatively analyzed，and five sensitive parameters brittleness index，Poisson's ratio，Young's modulus，tensile strength and horizontal stress difference were extracted. The weight of each parameter was obtained by analytic hierarchy process to establish the quantitative and comprehensive fracturing coefficient I_cr. Combined with the production data of shale gas wells，three fracturing grades Ⅰ，Ⅱ and Ⅲ were divided. Furthermore，the evaluation of fracturing grade of multiple wells and the correlation of well-connected profiles were carried out，and the formation thickness ratios of fracturing grades Ⅰ and Ⅱ were counted to analyze the distribution features of the fracturing performance in the plane. The results show that when I_cr ≥0.59，the fracturing grade of shale gas reservoir is grade Ⅰ，and its fracturing performance is the best. The fracturing profile show that the grade I interval in the sublayers 1 and 2 of Wufeng Formation-Longyi₁ submember accounts for a large proportion，and core description also shows that the natural fractures in this interval are the most developed and are the most suitable favorable intervals for shale gas fracturing development. The plan indicates that the areas with intervals of grade I fracturing performance with a thickness ratio of 0.8-0.9 are mainly distributed in N201，N209，N203，N208 and N211 well areas. The research results can pro-vide a key basis for effective development of X area shale gas horizontal wells.

Key words: shale gas, fracturing property, logging evaluation, brittleness index, analytic hierarchy process, southern Sichuan Basin

中图分类号:

P631.8

丛平, 闫建平, 井翠, 张家浩, 唐洪明, 王军, 耿斌, 王敏, 晁静. 页岩气储层可压裂性级别测井评价及展布特征——以川南X地区五峰组—龙马溪组为例[J]. 岩性油气藏, 2021, 33(3): 177–188.

CONG Ping, YAN Jianping, JING Cui, ZHANG Jiahao, TANG Hongming, WANG Jun, GENG Bin, WANG Min, CHAO Jing. Logging evaluation and distribution characteristics of fracturing grade in shale gas reservoir: A case study from Wufeng Formation and Longmaxi Formation in X area, southern Sichuan Basin[J]. Lithologic Reservoirs, 2021, 33(3): 177–188.

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页岩气储层可压裂性级别测井评价及展布特征——以川南X地区五峰组—龙马溪组为例

Logging evaluation and distribution characteristics of fracturing grade in shale gas reservoir: A case study from Wufeng Formation and Longmaxi Formation in X area, southern Sichuan Basin

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