气井压后出砂危害和尾追纤维技术控砂返出及增产效果评价  

FORMATION-WATER CHARACTERISTICS AND ITS RELATIONSHIP WITH HYDROCARBON PRESERVATION,DF1-1 GASFIELD IN YINGGEHAI BASIN

作　　者：龙学 何兴贵[1] 张朝举[1,2] 李晖[1] 靳正平[1] 

机构地区：[1]中国石化石油工程西南有限公司井下作业分公司 [2]西南石油大学研究生院

出　　处：《天然气勘探与开发》2010年第1期63-67,共5页Natural Gas Exploration and Development

摘　　要：川西气井加砂压裂中,约50%的井在压后排液及生产输气初期出现支撑剂返出而严重刺坏油嘴、针阀、闸门等地面设施,并给测试及输气生产带来安全隐患。尾追纤维技术不仅能有效控制支撑剂在排液过程中或输气初期阶段随流体返出,还可以提高压裂液的返排速度和缩短排液时间而降低压裂液对储层的伤害,进而提高支撑裂缝的导流能力,获得显著的油气增产稳产效果。目前已在川西气井压裂中获得普遍应用,具有广泛的推广应用前景。In this study, 17 formation-water samples of Yinggehai 2 Member, from six wells in DF1-1 gasfield, are at first carried out an analysis on chemical composition; and then they are classified by Sulin way; thirdly, the formation-water characteristics and origin are analyzed in lateral and vertical; at last, the hydrogeological, closure and preservation conditions of the gasfield are analyzed based on tectonic movements, accompanied CO2 invasion upward and petrology. It is considered that (1) the formation water of the member is mainly NaHCO3 type, a type of sedimentary water representing continental settings; (2) both Na2SO4 and MgCl2 types can be also found in formation water; and (3) in this gasfield, its hydrodynamics are basically poor whereas its hydrocarbon preservation is better, favorable for forming gas reservoir.

关 键 词：气井 危害 压裂 尾追纤维 控砂返出 增产 

分 类 号：TE358.1[石油与天然气工程—油气田开发工程]