矿权叠置区内多层系致密气藏开发技术探讨——以鄂尔多斯盆地神木气田为例  

Development techniques of multi-layer tight gas reservoirs in mining rights overlapping blocks: A case study of the Shenmu gas field, Ordos Basin, NW China

作　　者：武力超[1,2,3] 朱玉双[1,2] 刘艳侠[4,5] 周兆华[6] 何东博[6] 

机构地区：[1]大陆动力学国家重点实验室 [2]西北大学地质学系 [3]中国石油长庆油田公司气田开发处 [4]中国石油长庆油田公司苏里格气田研究中心 [5]低渗透油气田勘探开发国家工程实验室 [6]中国石油勘探开发研究院

出　　处：《石油勘探与开发》2015年第6期826-832,共7页Petroleum Exploration and Development

基　　金：国家重大科技专项(2011ZX05044)

摘　　要：以煤炭和天然气矿权完全叠置的鄂尔多斯盆地神木气田为例,分析煤炭和天然气协同开发的难点,制定协同开发技术对策。在研究上、下古生界气藏有利区展布主控因素和规律的基础上,结合井型井网论证、配套高效钻采和地面集输工艺优化出不同区域技术政策。结果表明:矿权叠置区内煤炭和天然气可以协同开发;多层系致密气藏有效储集层平面上可划分为上古生界砂体多边式叠合区、上古生界砂体多层式叠合区、上古生界砂体孤立式发育区、上下古生界有效储集层叠合发育区;9井丛井组为最优井网模式;储集层不同分区需用不同井型组合;集群化丛式井组部署、优化钻采工艺和配套地面集输新工艺,可缩短气藏建设和开发周期。实践证明,在矿权叠置区内煤炭和天然气协同开发的同时,也实现了上、下古生界多层系致密气藏的立体开发。The difficulties of making joint development of coal and natural gas were examined and the technical countermeasures were given through studying the case of the Shenmu gas field of the Ordos Basin, where the mining rights of coal and natural gas overlap completely. Based on the study of the main controlling factors of the distribution of favorable areas in the Upper and Lower Paleozoic formations, technical measures for different areas were determined considering well type, well pattern, efficient drilling and production, and ground gathering technology. The results show： The mining rights overlapping area of coal and natural gas can be developed jointly. The effective reservoirs of the multi-layer tight gas reservoirs can be divided horizontally into the superposition area for multi-boundaries sand body, multi-layers sand body and isolation sand body in the Upper Paleozoic formations, and the superposition area for effective reservoirs in the Upper and Lower Paleozoic formations. A cluster well group which includes nine wells is the optimal well pattern. Different reservoir area should be developed by different well type and patterns. The construction and development period of gas reservoirs will be shortened by the application of cluster well group, optimized technologies of drilling and production, and ground supporting facilities. Practice shows that the three dimensional development of the multi-layer tight gas reservoirs is also realized in the Upper and Lower Paleozoic when the joint development of coal and natural gas is done in the mining rights overlapping areas.

关 键 词：神木气田 矿权叠置区 煤层 致密气藏 协同开发 井型井网 配套工艺 

分 类 号：TE37[石油与天然气工程—油气田开发工程]