摘要
苏里格南区下古生界气藏具有良好的开发前景,亟需开展目标评价。本次充分利用岩心分析测试资料精细刻画马五5段储层特征,从沉积相、成岩作用、岩溶古地貌及现今构造等角度入手,进行特征详细分析并明确对储层分布的控制作用,同时结合试气产量及生产数据,最后建立开发目标综合评价标准并开展评价。评价结果显示,Ⅰ类为好储层,主要分布在膏质云坪及颗粒滩相,位于岩溶台地与鞍地转换带及古残丘,处于构造高部位,发育裂缝-孔隙型组合,占有利区的23%;Ⅱ类为中等储层,主要分布在云坪相,位于古残丘及古坡地,处于构造中-高部位,孔隙型为主,占有利区的38%;Ⅲ类为差储层,主要分布在含泥云坪及灰质云坪,位于古坡地及高地,处于构造低-中部位,发育裂缝-微孔型组合,占有利区的39%。最终优选Ⅰ+Ⅱ类叠合有利区面积979 km2,估算地质储量712.2×108m3,是研究区下古生界的优势开发区,也是调整挖潜、提高采收率的重点。
Lower paleozoic reservoir in Sulige area has good prospects for development, it is urgent to carry out the target evaluation. By making full use of core analysis and testing data reservoir characteristics of mawu5 section were descripted finely this time, starting from the sedimentary facies, diagenesis, karst palaeogeomorphology and recent structure, characteristics of them were analyzed and cleared its controlling on reservoir distribution, combined with the test yield and production data, finally established a comprehensive evaluation criteria and carried out. The result shows that the type Ⅰ is good reservoir, mainly distributed inthe gypsum of dolomitic flats and grain beach facies, located in the transformation of the karst platform and saddle land and ancient monadnock, in the high part of structure, development of cracks-pore combination, accounting for 23 % of the favorable area, the type Ⅱis medium reservoir, mainly distributed in the dolomitic flats, located in the ancient monadnock and ancient slope, in the medium- high part of construction, pore type, accounting for38 % of the favorable area, the type Ⅲ is poor reservoir, mainly distributed in the mud dolomitic flats and gray dolomitic flats, located in the ancient slopes and highlands, in the low-medium part of construction, development of cracks-microporous combination, accounting for 39 % of the favorable area. At last the paper preferably selects 979 km^2 of the typeⅠ＋Ⅱ overlapped with favorable area, and estimates 712.2×10^8m^3 of geological reserves, this area is the advantage development zone of lower paleozoic in study area, and is the emphases on adjusting and improving oil recovery.
出处
《石油化工应用》
CAS
2014年第9期75-80,共6页
Petrochemical Industry Application
基金
中国石油重大专项"低/特低渗透油藏有效开发技术研究-长庆油田油气当量上产5 000万t关键技术研究"
项目编号:2011E-1306
关键词
苏里格南区
储层特征
沉积相
成岩作用
岩溶古地貌
构造作用
综合评价
the south of sulige gas-field
reservoir characteristics
sedimentary facies
diagenesis
karst palaeogeomorphology
tectonism
comprehensive evaluation
