文13西气藏储层特征及剩余气开发潜力

RESERVOIR PROPERTY AND REMAINING GAS EXPLORATION POTENTIAL OF WEST WEN-13 GAS POOL

张云鹏 徐霜 李东 周翠萍 李志宝

Zhang Yunpeng Xu Shuang Li Dong Zhou Cuiping Li Zhibao

文1西气藏位于东濮凹陷文东构造带的西侧,主要含气层位为下第三系沙河街组段中亚段,主要储层为5砂组的第4、第8、第10小层.在构造较高部位,储层孔隙度较大,向低部位变小,渗透率的变化与此类似.5砂组具有较强的非均质性,渗透率变异系数一般在0.7～2.0之间.根据各断块、各小层的天然气储量分析结果,简单东块将原有部分油井改为采气井后,剩余气的开采可能会获得较好效果;简单西块南部构造高部位为剩余气的有利勘探区;文1-92块、文1-29块都有可能发现稳产期较短的高产井;而文1-122块因储量分散,气层薄、物性差,目前暂不宜进行开发.

West Wen 13 gas pool is situated in the west side of Wendong structural zone in Dongpu Depression.It's main gas bearing horizon is the middle submember of Sha 3 member of Eogene;the main reservoirs are the fourth,eighth and tenth sublayers of the fifth sand group.The reservoir porosity and permeability decrease from higher part to lower part of the structures,and the variation coefficient of permeability is within 0.7～2.0. According to the analysis results of gas reserves of each fault block and sublayer,better results could be obtained in gas recovery so long as some oil wells in east simple structural block be turned into gas producing wells;the high position in the south of west simple structural block is favourable for remaining gas exploration;wells with short-term and high productivity may be found in Wen 13-92,Wen13-293 Blocks,but Wen13-122 Block is not suitable for exploration at present time.

10.11743/ogg20010316