渤中凹陷东营组超压层的有机碳含量校正及超压成因分析

doi:10.3969/j.issn.1672-9803.2023.02.017

录井工程 ›› 2023, Vol. 34 ›› Issue (2): 103-108.doi: 10.3969/j.issn.1672-9803.2023.02.017

渤中凹陷东营组超压层的有机碳含量校正及超压成因分析

杨毅^①, 郭东明^①, 程乐利^②, 袁胜斌^①, 陈恭洋^②, 印森林^②

①中法渤海地质服务有限公司;
②长江大学录井技术与工程研究院

收稿日期:2023-05-10 出版日期:2023-06-25 发布日期:2023-07-12
作者简介:杨毅工程师,1979年生,2002年毕业于中国石油大学（北京）地质工程专业,现在中法渤海地质服务有限公司技术发展研究院从事解释与研究工作。通信地址：300457 天津市经济技术开发区信环西路19号天河科技园1号楼3层。电话：（022）66915106。E-mail：yangyi@cfbgc.com
基金资助:
中法渤海地质服务有限公司项目“地层压力预监测系统的研制与开发”（编号：CFG-TG-TI-2019-009）

Organic carbon content correction and overpressure genesis analysis for overpressure strata of Dongying Formation in Bozhong Sag

YANG Yi^①, GUO Dongming^①, CHENG Leli^②, YUAN Shengbin^①, CHEN Gongyang^②, YIN Senlin^②

①China France Bohai Geoservices Co., Ltd., Tianjin 300457,China;
②Institute of Mud Logging Technology and Engineering, Yangtze University, Jingzhou, Hubei 434023, China

Received:2023-05-10 Online:2023-06-25 Published:2023-07-12

摘要/Abstract

摘要： 渤中凹陷东营组地层普遍发育超压,对其超压地质成因仍有争议。前人通过声波速度与有效应力图板法分析,认为东营组超压以欠压实成因为主,而东营组发育大段泥岩地层,其中的高有机碳含量对于声波时差的影响不容忽视。基于地化录井资料对重点井的声波时差曲线进行了有机碳含量校正,重新分析了东营组超压层特征,并探讨了烃源岩超压成因分类。结果表明：渤中凹陷东营组超压层普遍具有高有机碳含量特征,声波时差经过校正后明显减小,平均降低幅度16.8%,将校正后的资料进行重新投点,表现为流体膨胀特征,这一结论与地层响应特征相符,有助于提高区域地层压力预监测精度,对其他地区烃源岩层系超压成因研究具有借鉴意义。

关键词: 渤中凹陷, 东营组, 有机碳含量校正, 超压特征, 超压成因

Abstract: The strata of Dongying Formation in Bozhong Sag generally develop overpressure, and the geologic origin of the overpressure remains controversial. Previous studies have analyzed the overpressure of the Dongying Formation using acoustic velocity and effective stress chart method, and concluded that the genesis of overpressure was mainly undercompaction. Large sections of mudstone strata were developed in Dongying Formation, in which the influence of high organic carbon content on interval transit time cannot be ignored. Based on geochemical logging data, the organic carbon content was corrected on the interval transit time curves of key wells,the characteristics of overpressure strata in Dongying Formation were re-analyzed, and the genetic classification of source rock overpressure was discussed. The results showed that the overpressure strata of Dongying Formation in Bozhong Sag generally had the characteristics of high organic carbon content, and the interval transit time decreased obviously after correction, with an average reduction of 16.8%. The drop points of the corrected data showed the characteristics of fluid expansion. This conclusion is consistent with bed response characteristics, which is helpful to improve the precision of regional pre-monitoring of formation pressure, and has reference significance for the research on the genesis of overpressure of source rock system in other areas.

Key words: Bozhong Sag, Dongying Formation, organic carbon content correction, overpressure characteristics, genesis of overpressure

中图分类号:

TE132.1

杨毅, 郭东明, 程乐利, 袁胜斌, 陈恭洋, 印森林. 渤中凹陷东营组超压层的有机碳含量校正及超压成因分析[J]. 录井工程, 2023, 34(2): 103-108.

YANG Yi, GUO Dongming, CHENG Leli, YUAN Shengbin, CHEN Gongyang, YIN Senlin. Organic carbon content correction and overpressure genesis analysis for overpressure strata of Dongying Formation in Bozhong Sag[J]. Mud Logging Engineering, 2023, 34(2): 103-108.

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渤中凹陷东营组超压层的有机碳含量校正及超压成因分析

Organic carbon content correction and overpressure genesis analysis for overpressure strata of Dongying Formation in Bozhong Sag

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