摘要
为了应对国际油价持续低位徘徊的严峻形势和适应国内环境保护工作的新要求,中国石油长庆油田公司在鄂尔多斯盆地苏里格气田开展了地质、开发技术攻关。通过地震+储层构型分析,对该气田上古生界河流相砂岩气藏储层进行了定量表征;开展成藏机理及主控因素综合分析,对下古生界海相碳酸盐岩气藏储层进行了整体评价。在此基础上,从井位部署、轨迹设计、地质导向等3个方面完善了致密砂岩水平井开发技术,形成了大井组布井技术及针对上古生界、下古生界气藏多层系含气特点的立体开发技术。上述勘探开发系列技术在该气田的实施效果表明:(1)上古生界气藏新增建产有利区150 km^2,下古生界气藏筛选出含气有利区450 km^2;(2)水平井开发技术的完善,提高了水平井在上古生界气藏的实施效果,2016年完钻水平井平均有效储层钻遇率超过60%、平均试气无阻流量达45×10~4 m^3/d;(3)上古生界、下古生界气藏立体开发技术大幅度提高了天然气储量的动用程度,提高了单井产量;(4)大井组开发技术的规模应用使单井平均占地面积缩减49.9%、单井平均建井周期缩短10 d,同时还便于气井生产管理、减少了环境污染。结论认为,该系列技术为苏里格气田降本增效提供了技术支撑,可供同类型气田借鉴。
To cope with the new requirements of domestic environmental protection and the severe situation of global oil price fluctuating at the low level, the PetroChina Changqing Oilfield Company conducted a series of geology and development technology researches in the Sulige Gas Field in the Ordos Basin. Firstly, the reservoirs of Upper Paleozoic fluvial sandstone gas reservoirs in this field were quantitatively characterized by performing seismic and reservoir configuration analysis. Then, hydrocarbon accumulation mechanisms and main control factors were analyzed comprehensively and the reservoirs of Lower Paleozoic marine carbonate gas reservoirs were evaluated. And thus, the horizontal-well development technology for tight sandstones was improved in three aspects, i.e., well deployment, trajectory design and geosteering. Besides, the well deployment technology for large well group and the tridimensional development technology for Upper and Lower Paleozoic gas reservoirs with multiple gas bearing series of strata were developed. The following results were obtained based on the implementation effects of above mentioned series of exploration and development technologies in the Sulige Gas Field. First, the area favorable for new productivity construction of Upper Paleozoic gas reservoirs is 150 km2, and the favorable gas bearing area selected in the Lower Paleozoic gas reservoirs is 450 km2. Second, the improvement of horizontal-well development technology increases the implementation effects of horizontal wells in Upper Paleozoic gas reservoirs. The average effective reservoir drilling rate of the horizontal wells drilled in 2016 is above 60%, and average AOF of production test is about 45 × 10 4 m3/d. Third, the tridimensional development tech- nology for Upper and Lower Paleozoic gas reservoirs increases significantly the producing degree of natural gas reserves and the single well production rate. Fourth, the scale application of large well group development technology reduces average land area covered by each well by 49.9% and cuts down the average construction cycle per well by 10 days. Besides, it is convenient for the production management of gas wells and the alleviation of environment pollution. It is concluded that this series of technologies provide the technical support for the cost reduction and efficiency improvement of the Sulige Gas Field, as well as the reference for similar gas fields.
作者
李进步
马志欣
张吉
付斌
白玉奇
黄文芳
冯敏
Li Jinbu;Ma Zhixin;Zhang Ji;Fu Bin;Bai Yuqi;Huang Wenfang;Feng Min(Exploration and Development Research Institute, PetroChina Changqing Oilfield Company, Xi＇an, Shaanxi 710018, China;National Engineering Laboratory for Low-permeability Oil ＆ Gas Exploration and Development, Xi＇an, Shaanxi 710018, China)
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2018年第2期51-58,共8页
Natural Gas Industry
基金
国家科技重大专项"鄂尔多斯盆地大型低渗透岩性地层油气藏开发示范工程"(编号:2016ZX05050)
中国石油天然气股份有限公司重大科技专项"长庆气田稳产及提高采收率技术研究"(编号:2016E-0509)
关键词
低油价
致密砂岩气藏
降本增效
大井组
多层系
立体化开发
水平井
苏里格气田
鄂尔多斯盆地
Low oil price
Tight sandstone gas reservoir
Cost reduction and efficiency improvement
Large well group
Multiple layers
Tridimensional development
Horizontal well
Sulige Gas Field
Ordos Basin
