鄂尔多斯盆地延安地区致密砂岩气藏“甜点”储层主控因素分析Major Controlling Factor of Tight Sandstone Gas Sweat Reservoir in Yan′an Area of Ordos Basin
杨希濮;孙卫;
摘要(Abstract):
通过物性分析、薄片分析、扫描电镜、压汞、核磁共振等多种方法相结合,对鄂尔多斯盆地延安地区致密砂岩气藏的孔隙结构进行了微观、定量分析。结果表明:山二段储层孔隙结构明显优于盒八段,山二段以粒间孔和溶孔为主,占总孔隙的77%,喉道较大,平均喉道半径为0.6μm,孔喉连通性较好;盒八段晶间孔相对较多,占总孔隙的32%,喉道较小,平均喉道半径为0.3μm,连通性较差。在此基础上对"甜点"储层主控因素进行了分析,研究表明:沉积与成岩作用的耦合是"甜点"储层的主控因素,主导储层空间展布和孔隙演化;沉积优势相带中,石英等刚性矿物含量高、填隙物含量少,导致储层在成岩过程中压实、胶结、杂质蚀变等破坏性作用减弱,溶蚀等建设性作用增强,促使孔隙结构向有利方向演化。
关键词(KeyWords): 致密砂岩气藏;孔隙结构特征;二叠系;山二段;盒八段
基金项目(Foundation): 国家科技支撑计划项目“低(超低)渗透油田高效增产改造和提高采收率技术与产业化示范”(2007BAB17B00)
作者(Author): 杨希濮;孙卫;
Email:
DOI:
参考文献(References):
- [1]郭少斌,郑红梅,黄家国,等.鄂尔多斯盆地上古生界非常规天然气综合勘探前景[J].地质科技情报,2014,33(6):69-77.
- [2]Sun W,Qu Z H,Tang G Q.Characterization of water injection in low permeability rock using sandstone micromobles[J].Journal of Petroleum Technology,2004,56(5):71-72.
- [3]Sun W,Tang G Q.Visual study of water injection in low permeable sandstone[J].Journal of Canadian Petroleum Technology,2006,45(11):21-26.
- [4]邹才能,陶士振,张响响,等.中国低孔渗大气区地质特征、控制因素和成藏机制[J].中国科学:D辑,2009,39(11):1607-1624.
- [5]Law B E,Curtis J B.Introduction to unconventional petroleum systems[J].AAPG Bulletin,2002,28(6):136-140
- [6]郑松,陶伟,袁玉松,等.鄂尔多斯盆地上古生界气源灶评价[J].天然气地球科学,2007,18(3):440-446.
- [7]魏虎,孙卫,屈乐,等.靖边气田北部上古生界储层微观孔隙结构及其对生产动态影响[J].地质科技情报,2011,30(2):85-90.
- [8]Aguilera R.Incorporating capillary pressure,pore throat aperture radii,height above free-water table,and Winland r35values on Pickett plots[J].AAPG Bulletin,2002,86(4):606-624.
- [9]Teige G M G,Hermanrud C,Thomas W H,et al.Capillary resistance and trapping of hydrocarbons:A laboratory experiment[J].Petroleum Geoscience,2005,11:125-129.
- [10]王香增,张丽霞,于波,等.鄂尔多斯盆地延长油气区山西组山2段储层砂岩成岩作用[J].地质科技情报,2013,32(1):114-118.
- [11]Schmid S,Worden R H,Fisher Q J.Diagenesis and reservoir quality of the Sherwood Sandstone(Triassic),Corrib Field,Slyne Basin,west of Ireland[J].Marine and Petroleum Geology,2004,21(3):299-315.
- [12]代金友,张一伟,熊琦华,等.成岩作用对储集层物性贡献比率研究[J].石油勘探与开发,2003,30(4):54-56.
- [13]France A B,Araujo L M,Maynard J B,et al.Secondary porosity formed by deep meteoric leaching:Botucatu eolicanite,Southern South America[J].AAPG Bulletin,2003,87(7):1073-1082.
- [14]季汉成,翁庆平,杨潇.鄂尔多斯盆地安塞-神木地区山西组成岩与沉积耦合关系[J].石油勘探与开发,2009,36(6):709-717.