储层岩石矿物成分对酸蚀裂缝导流能力的影响

储层岩石矿物成分是酸压改造效果影响因素之一。研究认为，在储层岩石矿物成分中易溶物的含量及分布方式决定了酸蚀裂缝导流能力大小，易溶蚀物的含量越多，岩石溶蚀速率越快。室内测试了不同溶蚀速率下的灰岩和白云岩的酸蚀裂缝导流能力，研究了岩石溶蚀速率、易溶蚀物含量对酸蚀裂缝导流能力的影响，对酸压工艺设计方案提出了指导性建议。研究结果表明，储层岩石溶蚀速率与酸蚀裂缝导流能力增加倍比存在抛物线关系，易溶蚀物占30%40% 时酸蚀裂缝导流能力保持较好。

Influence of Reservoir Mineralogical Composition on Acid Fracture Conductivity

The formation rock mineral composition is one of the factors affecting the effect of acid fracturing. This researchindicates that the content and distribution of easy dissolution in mineral composition of the reservoir rock determines the valueof conductivity in etching fracture，and the more content of easy dissolution there is，the faster the speed of dissolution is.In this paper，the conductivity of etching fracture have been tested with different dissolution rates of limestone and dolomite.The effect of conductivity of etching fracture with content of easy dissolution and dissolution rate has been researched. Someguidance advice to design proposal of acid fracturing treatment is presented. The results show that the fracture conductivitybetween the corrosion rate and the acid etching is the parabolic relationship. When easy dissolution accounts for 30% to 40%，the conductivity of etching fracture stays good.