安塞坪桥区延长组长9致密油储层预测及有利区优选

马浪; 杜彦军; 张治东; 惠瑞瑞; 王变阳; 宋健; 许璟; 何斌

doi:10.19751/j.cnki.61-1149/p.2022.01.018

安塞坪桥区延长组长9致密油储层预测及有利区优选

1. 陕西延长油田(集团)有限责任公司研究院, 陕西西安 710075;
2. 延长油田股份有限公司杏子川采油厂, 陕西延安 717400

基金项目:

陕西延长石油（集团）有限责任公司研究院2019年科技项目“延长探区中生界剩余石油资源潜力分析及项目评价”（ycsy2019-ky-A-14）。

详细信息

作者简介:
马浪(1987-),男,陕西省佳县人,硕士,高级工程师,主要从事石油地质研究工作。E-mail:maalaang@163.com。

中图分类号: P618.13
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出版历程
- 收稿日期: 2020-11-22
- 修回日期: 2021-05-11
- 网络出版日期: 2022-07-28
- 发布日期: 2022-03-04

Chang 9 Tight Oil Reservoir Prediction and Favorable Zone Selection in Yanchang Formation of Ansaipingqiao Area

1. Research Institute of Shaanxi Yanchang Petroleum(Group) Co., Ltd., Xi'an 710075, Shaanxi, China;
2. Yanchang Oil Field Stock Limited Company, Yan'an 717400, Shaanxi, China

摘要

摘要: 针对安塞坪桥区长9油层组致密油储层难以预测、勘探开发有利区不明确、严重制约勘探开发进程等问题，笔者通过对典型取心井岩相、测井相研究，在确定砂岩沉积微相类型及其空间演化的基础上，对砂岩进行横向追踪对比，准确获取单砂体厚度数据，刻画出单砂体展布特征，并结合生产动态情况，优选出致密油勘探开发有利目标区。研究结果表明，研究区致密油主要分布在长9油层组上部，自上而下可以分为3套砂体。其中，上部1号砂体属于小范围水下分流河道沉积，砂体厚度为1~3 m，油藏分布局限，开发潜力小；下部3号砂体属于水下分流河道沉积，砂体厚度为6~12 m。预测研究区中部P149-6井区、南部H87-19井区和W328-8井区是致密油开发的有利区，其中研究区中部P149-6井区油层分布稳定，对油藏认识程度较高，能够作为水平井开发先导试验靶区。研究成果有效解决了坪桥区致密储层预测难的问题，可以为具有相似地质特征的储层预测提供参考。
- 坪桥区 /
- 长9 /
- 致密油 /
- 单砂体 /
- 储层预测
Abstract: This paper studies the lithofacies and logging facies of typical coring wells. The sandstone is tracked and compared horizontally on the basis of the types of sedimentary microfacies of the sandstone and its spatial evolution. The thickness data of the single sand body is accurately obtained and the distribution characteristics of the single sand body are thus described. Therefore, favorable target area of tight oil are optimized through the production dynamics. The results show that the tight oil in the study area is mainly distributed in the upper part of the Chang 9 oil layer group, dividing into three sets of sand bodies from the top to the bottom. The upper No.1 sand body belongs to the underwater distributary channel deposits, with a thickness of 1~3m. The reservoir distribution is limited and the development potential is small. The lower No. 3 sand body belongs to the underwater distributary channel deposition, and the thickness of the sand body is 6-12m. It is predicted that the central P149-6 well area, the southern H87-19 well area and the W328-8 well are the favorable zones for tight oil development. Among them, the central P149-6 well has stable oil layer distribution, and can be a pilot test area. The research effectively solves the problem of tight reservoir prediction in Pingqiao area, and provides reference for reservoir prediction in similar geological areas.
- Pingqiao area /
- Chang 9 /
- tight oil /
- single sand body /
- reservoir prediction

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