马-什-广地区蓬莱镇组气藏压裂井产量逐步上涨原因探讨  

REASONS WHY FRACTURED-WELL PRODUCTION INCREASES IN PENGLAIZHEN GAS RESERVOIR, MA-SHI-GUANG AREA

作　　者：刁素[1] 栗铁峰[1] 刘琦[1] 勾宗武[1] 

机构地区：[1]中国石化西南油气分公司石油工程技术研究院

出　　处：《天然气勘探与开发》2016年第1期39-42,11,共4页Natural Gas Exploration and Development

基　　金：国家科技重大攻关专项(编号:2011ZX05002)<大型油气田及煤层气开发>下设专题(编号:2011ZX05002-004-003)<四川盆地低渗气藏储层改造工艺技术研究>的部分研究内容

摘　　要：马-什-广地区蓬莱镇组气藏属于典型的常压-高压致密砂岩气藏,地层非均质性强,该气藏在开发过程中,压后产量相差较大,针对部分井压后测试产量低,生产或关井一段时间后产量明显上涨的情况,对各井储层物性进行了分析,认识到产量上涨的这些井具有储层泥质含量高,储层孔隙度和渗透率均高于该区的平均值。通过对该区的储层微观特征和渗流机理进行实验研究,认为水敏和水相圈闭损害是造成这些井初期测试产量低,一段时间后产量明显上涨的主要原因。提出了降低水敏和水相圈闭损害的压裂工艺措施。Penglaizhen Formation, Ma-Shi-Guang area, is a typical tight sandstone gas reservoir with atmospheric-high pressure, and is characterized by strong heterogeneity. There exists great variance in gas output after fracturing. In some wells, a testing production after fracturing is low but increases significantly after producing or shut in for some time. Given this, some reservoir properties were analyzed. Results show that these wells with production increase are characterized by high shale content in reservoir, and their porosity and permeability are higher than the averages of this area. According to microscopic characteristics and percolation mechanism, we consider that the main factors causing this production variance are water sensitivity and water-phase trapping damage. Furthermore, a fracturing technology to reduce water sensitivity and damage is proposed.

关 键 词：产量上涨 水敏 含水饱和度 液膜厚度 水相圈闭 

分 类 号：TE328[石油与天然气工程—油气田开发工程]