天然气工业2017，Vol.37Issue(9)：39-47,9.DOI:10.3787/j.issn.1000-0976.2017.09.005
苏里格气田国际合作区河流相储层井位部署关键技术
Key technologies for well location deployment in fluvial reservoirs in the southern Sulige Block, Ordos Basin, a CNPC-Total joint project
摘要
Abstract
The CNPC-Total joint natural gas project is located in the south central Sulige Gasfield,and its development target is lithologic gas reservoir of complex fluvial facies.The prerequisite and fundament for rational and efficient well deployment and development is to figure out the types,distribution,scale and concentration degrees of those fluvial reservoirs.Based on practical exploration and technical research,a series of key technologies for well location deployment in this block have been developed,including lithology identification based on the 3D seismic Poisson ratio,prediction of main channel belts in a chessboard well pattern,channel micro-facies dissection,dynamic-static selection of high-productivity wells,and drilling of E-W horizontal wells.The following results are achieved based on the practice.First,by virtue of seismic inversion of the Poisson ratio,thick sandstones can be identified effectively (the Poisson ratios of sandstone are 0.19-0.25,and those of shale are 0.27-0.30),and the distribution of major channel belts can be understood.Second,the central part of a river can be identified quickly by extracting the thickness of the net sand (GR ＜ 60 API,effective porosity ＞ 6％,and gas saturation ＞ 60％) in the chessboard well pattern.Third,it is clarified that two types of superposed channel belts are developed in this block,and five types of sedimentary facies and ten channels subfacies are identified.Fourth,analysis on dynamic-static well parameters shows that the typical configuration of high-productivity wells in He 8 Member of Lower Shihezi Fm,Upper Paleozoic (the EUR ＞ 1×108m3) is low GR (＜ 40 API),high effective porosity (＞ 10％) and high deep resistivity (＞ 90 Ω · m).And fifth,it is favorable for the lateral communication of multi-stage channels by arranging E-W horizontal wells in the central area of main braided channel belts.It is concluded that this set of key technologies for well location deployment deepens cognitions on the geological laws of fluvial reservoirs in this block and provides effective supports for the development and construction of this cooperation block.关键词
苏里格气田国际合作区/二叠纪/三维地震泊松比/棋盘式井网/净砂岩/主河道带/动—静参数分析/水平井/井位部署Key words
Joint South Sulige natural gas project/Permian/3D seismic Poisson Ratio/Chessboard well pattern/Net sand/Main channel belts/Dynamic-static parameter analysis/Well location deployment of horizontal wells引用本文复制引用
郝骞,卢涛,李先锋,李武科..苏里格气田国际合作区河流相储层井位部署关键技术[J].天然气工业,2017,37(9):39-47,9.基金项目
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开发示范工程”(编号:2016ZX05050)、国家科技重大专项“致密气储层精细描述与地质建模技术应用”(编号:2016ZX05047003-006). （编号:2016ZX05050）
