REDUCTIONS IN THE PRODUCTIVITY OF OIL AND LOW PERMEABILITY GAS-RESERVOIRS DUE TO AQUEOUS-PHASE TRAPPING
REDUCTIONS IN THE PRODUCTIVITY OF OIL AND LOW PERMEABILITY GAS-RESERVOIRS DUE TO AQUEOUS-PHASE TRAPPING
复制标题
DOI：
10.2118/94-09-05
复制
发表时间：
1994-11-01
影响因子：
--
通讯作者：
CIMOLAI, MP
中科院分区：
文献类型：
--
作者：
BENNION, DB;BIETZ, RF;CIMOLAI, MP
许多含烃储层由于与侵入的含水流体的保留相关的不利的相对渗透率效应而表现出显著的生产率降低的潜力。 这些流体可以包括水基钻井泥浆、完井液、压裂液、修井液、压井液或增产液（包括废酸）。本文确定了相圈闭背后的潜在机理，并确定了易受这种类型地层损害影响的特定储层类型，最明显的是低初始含水饱和度气藏和强亲油油藏。 实验室技术，以调查的严重性，水圈闭和各种补救技术进行了说明，并介绍了两个现场案例研究，说明由于侵入性水圈闭的渗透率损害的潜力。 一个案例研究描述了在阿尔伯塔省中部深盆地地区的Paddy地层和Cadomin地层（两个产气区）完成的一系列威尔斯。 实验室案例研究记录的现象，水相捕获在强亲油多孔介质中也提出。
Many hydrocarbon bearing reservoirs exhibit the potential for significant productivity reductions due to adverse relative permeability effects associated with the retention of invaded aqueous fluids. These fluids could include water-based drilling mud filtrates, completion fluids, fracture fluids, workover fluids, kill fluids or stimulation fluids (including spent acid).This paper identifies potential mechanisms behind phase trapping and identifies particular reservoir types which tend to be susceptible to this type of formation damage, most notably low initial water saturation gas reservoirs and strongly oil-wet oil reservoirs. Laboratory techniques to investigate the severity of aqueous trapping and various remedial techniques are described, and two field case studies illustrating the potential for permeability impairment due to invasive aqueous trapping are presented. One case study describes a series of wells completed in the Paddy formation and the second in the Cadomin formation in the Deep Basin area of central Alberta (both gas producing zones). Laboratory case studies documenting the phenomenon of aqueous phase trapping in strongly oil-wet porous media are also presented.