潜山灰岩溶蚀和裂缝的特征参数应用

Application of characteristic parameters of karst and fracture of buried hill carbonate rock

潜山灰岩储层溶蚀和裂缝发育程度的差异造成在测井曲线上不同的响应特征,而且在钻井过程中具有不同的油气显示。主要高产油气层段都对应裂缝及溶蚀相对发育的层段,裂缝或溶蚀不发育层段对应致密灰岩层,一般为干层,而介于两者之间的弱溶蚀或裂缝发育差层段往往是低产油层。通过提取反映溶蚀和裂缝发育的控制特征参数——测井参数、溶蚀参数和录井参数,对潜山灰岩储层溶蚀和裂缝发育程度进行解释、分级与评价,最后给出了综合评价结果。

Well logging curves are different because of different developed degree of karst and fracture of buried hill carbonate rock. And also the rocks have the different oil/gas show during well drilling. The rock could form commercial oil-bearing area when its fracture and karst are more developed, but it could form low production or even no production when its fracture and karst are less developed. In this paper, by extracting the characteristic parameters such as logging parameters, karst parameters and mud logging parameters, the developed degree of karst and fracture was interpreted, classified and appraised.