摘要
陕北富县探区下古生界马家沟组沉积了一套以蒸发潮坪相为主的白云岩、含膏云岩等碳酸盐岩沉积物。据区内钻探的4口古生界探井分析,马家沟组碳酸盐岩溶蚀孔洞、裂缝不够发育,且大部分被方解石和泥质所充填,导致储层的基质孔隙度和渗透率较低,属Ⅲ类储层。通过对该碳酸盐岩储层特征的分析,在富古1、富古2井选择了多级注入酸压一闭合酸化气层改造工艺技术,施工取得了圆满成功,有效地改变了储层的渗流条件。
Majiagou Formation of lower Paleozoic in Fuxian exploration area of Shanbei is a vital exploration layer, which has deposited a set of carbonate sedimentation dominated by dolomite with evaporated tide flat phase and gypsum rock et al. . In accordance with the analysis of four exploration wells in Paleozoic era in exploration area,there doesn't exist in too much carbonate solution porosity and crack in Majiagou group,and most of them are filled with calcite and clay resulting in low porosity and permeability of reservoir belonged to Ⅲ class. A successful technique with multi-scale acidic gas layer reconstruction has been performed in well Fugu 1 and 2 through the character analysis of carbonate reservoir, which has efficiently changed influent condition and provide much valuable experience in gas layer reconstruction in Paleozoic era.
出处
《断块油气田》
CAS
2002年第3期26-28,共3页
Fault-Block Oil & Gas Field
