济阳坳陷渤南洼陷古近系沙河街组流体压力建场过程及其石油地质意义

doi:10.12108/yxyqc.20230206

岩性油气藏 ›› 2023, Vol. 35 ›› Issue (2): 59–67.doi: 10.12108/yxyqc.20230206

济阳坳陷渤南洼陷古近系沙河街组流体压力建场过程及其石油地质意义

郑彬¹, 董翱¹, 张源智², 张毅¹, 苏珊³, 张士超¹, 樊津津¹, 骆垠山²

1. 中国石油青海油田公司采气二厂, 甘肃敦煌 736200;
2. 保利协鑫天然气集团控股有限公司, 北京 100017;
3. 中国石油青海油田公司采油一厂, 甘肃敦煌 736200

收稿日期:2022-05-22 修回日期:2022-06-16 出版日期:2023-03-01 发布日期:2023-03-07
第一作者:郑彬(1986-),男,本科,工程师,主要从事油气田开发工作。地址:(736200)甘肃省敦煌市七里镇青海油田采气二厂。Email:zblhqh@petrochina.com.cn。
通信作者: 张源智(1975-),男,硕士,高级工程师,主要从事油藏精细描述、滚动评价等方面的研究工作。Email:328071197@qq.com。
基金资助:
国家重大专项“渤海湾盆地精细勘探关键技术”（编号：2016ZX05006）资助。

Fluid pressure field building process and its petroleum geological significance of Paleogene Shahejie Formatiom in Bonan sag, Jiyang Depression

ZHENG Bin¹, DONG Ao¹, ZHANG Yuanzhi², ZHANG Yi¹, SU Shan³, ZHANG Shichao¹, FAN Jinjin¹, LUO Yinshan²

1. No. 2 Gas Production Plant, PetroChina Qinghai Oilfield Company, Dunhuang 736200, Gansu, China;
2. POLY-GCL Petroleum Group Holdings Limited, Beijing 100017, China;
3. No. 1 Oil Production Plant, PetroChina Qinghai Oilfield Company, Dunhuang 736200, Gansu, China

Received:2022-05-22 Revised:2022-06-16 Online:2023-03-01 Published:2023-03-07

摘要/Abstract

摘要： 通过对济阳坳陷渤南洼陷古近系沙河街组泥页岩和致密砂岩中的流体包裹体进行古压力测试，恢复了其流体压力演化过程，并探讨了其石油地质意义。研究结果表明： ①渤南洼陷沙三段在馆陶组沉积期及之后共经历了4次压力场重建过程，每次压力场重建的持续时间均为3～4 Ma，表现为低序级幕式特征。②与沙三段低序级幕式压力建场过程不同的是，沙四上亚段在上覆石膏岩的封盖下，压力场重建的门限较高，在东营组沉积期及馆陶组沉积末期发生2次压力场重建过程，表现为高序级幕式特点。③研究区沙三段低序级幕式压力建场过程指示着开放的流体环境和较强的酸性溶蚀作用，以低序级幕式压力建场为主的沙三段储集层物性整体优于高序级幕式建场的沙四上亚段储集层；沙三段烃源岩在排出大量烃类物质的同时，其自身储集空间中也会存在部分残留，从而形成常规油与页岩油的共同富集区。

关键词: 低序级幕式, 高序级幕式, 流体压力建场, 沙三段, 沙四上亚段, 古近系, 渤南洼陷, 济阳坳陷

Abstract: The fluid inclusions in shale and tight sandstone of Paleogene Shahejie Formation in Bonan sag of Jiyang Depression were tested for Paleopressure, the fluid pressure evolution process was restored, and its petroleum geological significance was discussed. The results show that:(1) The third member of Shahejie Formation(Es₃) in Bonan sag experienced four pressure field reconstruction processes in Guantao Formation and subsequent sedimentary periods. The duration of each pressure field reconstruction is 3-4 Ma, showing the characteristics of low sequence episodic pattern.(2) Different from the low sequence episodic pressure field building process of Es₃, the Es₄ has a high threshold for pressure field reconstruction under the sealing of overlying gypsum rocks. Two pressure field reconstruction processes occurred during the sedimentary period of Dongying Formation and the end of Guantao Formation, showing the characteristics of high sequence episodic pressure field.(3) The low sequence episodic pressure field building process of Es_{3 i} ndicates an open fluid environment and strong acid dissolution. The physical properties of Es_{3 r} eservoir with low sequence episodic pressure field are higher than those of the upper Es_{4 r} eservoir with high sequence episodic pressure field. The hydrocarbon source rocks of Es_{3 n} ot only discharge a large number of hydrocarbons, but also contains hydrocarbons in its own reservoir space, so as to form enrichment areas of conventional oil and shale oil.

Key words: low sequence episodic pattern, high sequence episodic pattern, fluid pressure field building, the third member of Shahejie Formation, the upper fourth member of Shahejie Formation, Paleogene, Bonan sag, Jiyang Depression

中图分类号:

TE122.1

郑彬, 董翱, 张源智, 张毅, 苏珊, 张士超, 樊津津, 骆垠山. 济阳坳陷渤南洼陷古近系沙河街组流体压力建场过程及其石油地质意义[J]. 岩性油气藏, 2023, 35(2): 59–67.

ZHENG Bin, DONG Ao, ZHANG Yuanzhi, ZHANG Yi, SU Shan, ZHANG Shichao, FAN Jinjin, LUO Yinshan. Fluid pressure field building process and its petroleum geological significance of Paleogene Shahejie Formatiom in Bonan sag, Jiyang Depression[J]. Lithologic Reservoirs, 2023, 35(2): 59–67.

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济阳坳陷渤南洼陷古近系沙河街组流体压力建场过程及其石油地质意义

Fluid pressure field building process and its petroleum geological significance of Paleogene Shahejie Formatiom in Bonan sag, Jiyang Depression

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