CAJ | 학술논문

致密气藏岩石孔隙小，吼道结构复杂，一旦骨架有效应力发生变化，骨架颗粒与孔喉结构的原始关系也发生变化，导致气水两相渗流通道发生变化，孔隙度、渗透率进一步降低，产能受到严重影响。通过实验深入研究致密储气层基质岩心和裂缝岩心在不同围压下应力变化导致气水两相流体的相对流动能力变化趋势，有利于认清致密气藏储层流体的渗流规律，并对其合理产能做出准确的评价。以长庆致密气藏P1 s、P2 h储层岩心为例，基于应力敏感实验，讨论了岩石渗透率应力敏感对致密储气层气水两相流动及产能的影响。
치밀기장암석공극소，후도결구복잡，일단골가유효응력발생변화，골가과립여공후결구적원시관계야발생변화，도치기수량상삼류통도발생변화，공극도、삼투솔진일보강저，산능수도엄중영향。통과실험심입연구치밀저기층기질암심화렬봉암심재불동위압하응력변화도치기수량상류체적상대류동능력변화추세，유리우인청치밀기장저층류체적삼류규률，병대기합리산능주출준학적평개。이장경치밀기장P1 s、P2 h저층암심위례，기우응력민감실험，토론료암석삼투솔응력민감대치밀저기층기수량상류동급산능적영향。
There are small pore and complicated structures of pores and throats in tight gas reservoirs.Once the skele-ton effective stresses changed,original relationship between skeleton grains and structures of pores and throats also changed.As a result,channels of gas/water two phase flows also changed,and porosity and permeability of the reservoirs further reduced.These changes seriously affected productivity of the tight gas reservoirs.For matrix cores and fractured cores of tight gas reservoirs,it was studied to the changed trend of gas/water flow ability caused by stress changes under va-rious confining pressures.Lab results are favorable to recognizing the flow rule of the tight gas reservoirs and accurately e-valuating reasonable productivity.Let us take cores of Changqing tight gas reservoirs,P1 s、P2 h,for examples.According to rock stress sensitive experiments,this paper presents the effect of stress sensitivity of rock permeability on gas/water two phase flow ability and productivity of the tight gas reservoirs.