压裂施工曲线应用于深层页岩气水平井裂缝评价

doi:10.11885/j.issn.1674-5086.2022.10.18.04

西南石油大学学报(自然科学版) ›› 2024, Vol. 46 ›› Issue (5): 1-18.DOI: 10.11885/j.issn.1674-5086.2022.10.18.04

• 地质勘探 • 下一篇

压裂施工曲线应用于深层页岩气水平井裂缝评价

闫建平^1,2,3, 来思俣^1,2, 郭伟⁴, 廖茂杰⁵, 黄毅⁶

1. 西南石油大学地球科学与技术学院, 四川成都 610500;
2. 天然气地质四川省重点实验室, 四川成都 610500;
3. 油气藏地质及开发工程全国重点实验室·西南石油大学, 四川成都 610500;
4. 中国石油勘探开发研究院, 北京海淀 100083;
5. 中国石油西南油气田公司页岩气研究院, 四川成都 610000;
6. 中国石油集团测井有限公司西南分公司, 重庆渝北 400021

收稿日期:2022-10-18 发布日期:2024-11-07
通讯作者: 闫建平,E-mail:yanjp_tj@163.com
作者简介:闫建平,1980年生,男,汉族,内蒙古凉城人,教授,博士,主要从事测井地质学、岩石物理及非常规油气测井评价方面的教学与研究工作。E-mail:yanjp_tj@163.com
来思俣,2000年生,女,汉族,四川成都人,硕士研究生,主要从事测井地质学、非常规油气测井评价及应用方面的教学与研究工作。E-mail:laisiyu0101@163.com
郭伟,1973年生,男,满族,河北承德人,高级工程师,博士,主要从事页岩气开发地质及综合评价工作。E-mail:pkuguowei-69@petrochina.com.cn
廖茂杰,1986年生,男,汉族,四川南充人,高级工程师,主要从事非常规储层测井解释评价方面的研究工作。E-mail:liaomj@petrochina.com.cn
黄毅,1982年生,男,土家族,重庆江北人,工程师,硕士,主要从事测井评价技术研究工作。E-mail:huangl_cj@cnpc.com.cn
基金资助:
国家自然科学基金（42372177）;中国石油西南石油大学创新联合体科技合作项目（2020CX020000）;四川省自然科学基金（2022NSFSC0287）;高等学校学科创新引智计划（111计划）（D18016）;中国石油科技部“十四五”重大专项（2021DJ1901）

Application of Fracturing Construction Curve in Fracture Evaluation of Deep Shale Gas Horizontal Wells

YAN Jianping^1,2,3, LAI Siyu^1,2, GUO Wei⁴, LIAO Maojie⁵, HUANG Yi⁶

1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. Natural Gas Geology Key Laboratory of Sichuan Province, Chengdu, Sichuan 610500, China;
3. State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
4. Research Institute of Petroleum Exploration & Development, PetroChina, Haidian, Beijing 100083, China;
5. Research Institute of Shale Gas, Southwest Oil & Gasfield Company, PetroChina, Chengdu, Sichuan 610000, China;
6. Southwest Branch, CNPC Logging Company Limited, Yubei, Chongqing, 400021, China

Received:2022-10-18 Published:2024-11-07

摘要/Abstract

摘要： 页岩气水平井通常没有取芯、电成像等资料，增加了裂缝识别难度，而压裂施工曲线能较好地反映出压裂效果和压前天然裂缝的发育情况。以川南泸州Y101区块深层页岩气地层为例，根据携砂液阶段压裂施工曲线类型及特征刻度水平井压前裂缝层段、基质层段的测井响应特征，利用小波变换提取反映裂缝信息的高频微弱信号建立小波变换综合系数（W_I）、交会图优选6项对裂缝响应敏感的参数指标、层次分析法与模糊数学法构建裂缝评价综合系数（F_I），并进一步结合不同压裂施工曲线类型与测井信息的关系，实现了水平井裂缝层段识别及发育级别评价。研究结果表明，携砂液阶段压裂施工曲线形态有下降型（I）、下降稳定型（II）、稳定型（III）及上升型（IV）4种类型，其中，当自然伽马高值、补偿中子和密度明显增大、声波时差增大伴“锯齿状”周波跳跃、双侧向呈“正差异”且W_I≥0.18，F_I≥0.430时，压裂施工曲线为下降型，裂缝发育好（F-A级）； 0.390≤F_I<0.430时，既有下降型又有下降稳定型，裂缝较发育（F-B级）； 0.350≤F_I<0.390时，为下降稳定型，裂缝一般发育（F-C级）。

关键词: 深层页岩气, 水平井, 压裂施工曲线, 裂缝评价, 测井信息

Abstract: Shale gas horizontal wells usually do not have coring and electrical imaging scales, which makes it difficult to identify fractures. The fracturing operation curve can reflect the fracturing effect and the development of natural fractures before fracturing. Taking the deep shale gas formation of Block Y101 in Luzhou, southern Sichuan as an example, according to the type and characteristics of the fracturing operation curve in the sand-carrying fluid stage, the logging response characteristics of the fracture layer and the matrix layer before the fracturing of the horizontal well are calibrated. The wavelet transform is used to extract the high-frequency weak signal reflecting the fracture information to establish the wavelet comprehensive coefficient (W_I), the crossplot is used to select six parameter indexes sensitive to the fracture response, the analytic hierarchy process and the fuzzy mathematics method are used to construct the fracture evaluation comprehensive coefficient (F_I), and the relationship between different fracturing operation curve types and logging information is further combined to realize the identification and development level evaluation of horizontal well fracture layers. The results show that the fracturing construction curve of the sand-carrying fluid stage has a descending type (I), a descending stable type (II), a stable type (III), and an ascending type (IV). Among them, when the natural gamma high value, the compensated neutron and the density increase significantly, the acoustic time difference increases with the “jagged” cycle jump, the double lateral shows a “positive difference” and W_I≥0.18，F_I≥0.430, the fracturing construction curve is a descending type, and the fracture is well developed (F–A grade); When 0.390≤F_I<0.430, there are both downward type and downward stable type, and the fractures are more developed (F–B grade); when 0.350≤F_I<0.390, it is a descending stable type, and the fractures are generally developed (F–C grade).

Key words: deep shale gas, horizontal well, fracturing operation curve, fracture evaluation, logging information

中图分类号:

TE122

闫建平, 来思俣, 郭伟, 廖茂杰, 黄毅. 压裂施工曲线应用于深层页岩气水平井裂缝评价[J]. 西南石油大学学报(自然科学版), 2024, 46(5): 1-18.

YAN Jianping, LAI Siyu, GUO Wei, LIAO Maojie, HUANG Yi. Application of Fracturing Construction Curve in Fracture Evaluation of Deep Shale Gas Horizontal Wells[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2024, 46(5): 1-18.

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压裂施工曲线应用于深层页岩气水平井裂缝评价

Application of Fracturing Construction Curve in Fracture Evaluation of Deep Shale Gas Horizontal Wells

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