盐间非砂岩油藏敏感性分析及驱油机理研究  

THE SENSITIVITIES OF THE INTER-SALT LAYER NONE-SANDSTONE RESERVOIR AND EOR MECHANISMS

作　　者：惠健[1] 刘建仪[1] 刘尧文[2] 何建华[2] 孙良田[1] 

机构地区：[1]西南石油大学,四川成都610500 [2]中国石化江汉油田分公司勘探开发研究院

出　　处：《西南石油大学学报（自然科学版）》2007年第4期79-81,共3页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：国家'十五'攻关项目'高温;高压条件下气水;油气相渗实验研究'(2001BA605A02-04)。

摘　　要：江汉盆地潜江凹陷盐间非砂岩油气资源丰富,油藏具有单层厚度薄、纵向层数多、累积厚度大、油层连片性强、分布范围广的特点。试油试采表明,潜江凹陷盐间非砂岩油藏具有较大的增产潜力。盐间非砂岩油井普遍产量递减迅速。要适当控制开采速度,合理利用天然能量,采取有效增产措施提高最终采收率。对江汉油田王平1井区和王北11-5井区盐间非砂岩地层开展了水敏和气敏等储层伤害因素室内实验评价,并分别选用水和氮气作为注入介质进行岩芯驱替实验。通过对比分析敏感性实验和岩芯驱替实验结果,提出针对该盐间非砂岩油藏不同区块的合理开采方式,即王平1井区储层注水有助于改善渗流通道从而改造储层,而王北11-5井区存在强水敏性,适宜通过注氮气进行开采。Inter-salt layer non-sandstone reservior in Qianjiang Depression of Jianghan Basin contains plentiful oil and gas resources, the characterisitics of the formations include the thin monolayer, muti-layer in vertical, huge total thickness of the formation and connected and wildly spreaded oil blocks. Oil tests show that the formation in the depression has EOR potential while most of the wells have a decreasing production rate. In order to use the inartificial resourses in an effective way, the production rate in an acceptable scale should be hold, also, the final recovery rate should be increased in effective ways. Based on the sensitivities analyze of the inter-salt layer none-sandstone reservoir and core tests sampling from Wangping well block 1 and Wangbei well block 11-5, this paper presents the best exploitation way for special wells of this reservior.The rational way of exploitation in Wangping Well 1 District is waterflooding, and that the best way of exploitation in Wangbei Well 11-5 District is nitrogen injection.

关 键 词：盐间非砂岩 水敏 气敏 岩芯实验 提高采收率 

分 类 号：TE122[石油与天然气工程—油气勘探]