摘要
歧口凹陷位于大港油田黄骅坳陷的中北部,其埋深大于3000m的古近系低孔低渗储集层分布广泛,勘探程度低,潜在的油气资源丰富,是现今乃至今后几年油气勘探的重点领域。低孔低渗储集层成因及控制因素研究对歧口富油气区域的勘探意义重大。从大量基础岩石物理实验数据出发,通过对低孔低渗储集层与深度、层系、岩性及沉积相带等关系进行分析,认为歧口凹陷低孔低渗储集层成因机理是由储集层岩石矿物成分、沉积相带、压实作用、成岩作用等因素共同控制,在低孔低渗储集层评价中要特别重视沉积相带的变化,重视胶结物的性质和成岩作用,可以提高低孔低渗储集层有效性分析和油气层评价成功率。
Qikou sag is located in the north-central Huanghua depression of Dagang Oilfield, its Paleogene reservoirs with more than 3000 m buried depth in low porosity and low permeability are widely distributed, they are low level of exploration and their potential oil and gas resources are rich. It is a key area for oil and gas exploration in the next few years. The study on genesis and control factors of reservoirs with low porosity and low permeability is significant for the rich oil and gas areas′ exploration in Qikou sag. Starting from a large number of basic petrophysical experimental data, by analyzing the relationship between low porosity and low permeability reservoirs and depth, series of strata, lithology and sedimentary facies belts, the authors considered that the causative mechanisms of low porosity and low permeability reservoirs in Qikou sag are controlled by mineralogical composition of the reservoir rock, sedimentary facies belts, compaction and diagenesis. The inspiration can be got from the analytical results for sedimentary facies and petrophysical properties, that is, under the condition of the certain buried depth of the reservoirs, sedimentary facies belts are different, physical properties of reservoirs change greatly, and the dominant sedimentary facies belts developed high quality reservoirs. During evaluating the reservoirs with low porosity and low permeability, the special attention should be paid to the changes in sedimentary fecies belts, the properties of cement and diageneses, thus improving the effectiveness of analyzing the reservoirs with low porosity and low permeability and successfully evaluating reservoirs.
出处
《录井工程》
2013年第1期81-84,90,共4页
Mud Logging Engineering
关键词
歧口凹陷
低孔低渗储集层
成因机理
机械压实
沉积相带
碳酸盐岩矿物胶结
成岩作用
Qikou sag, low porosity and low permeability reservoir, causative mechanism, mechanical compaction, sedimentary facies belt, mineral cement of carbonate rock, diagenesis
作者简介
吴淑琴高级工程师，1958年生，1980年毕业于江汉石油学院测井专、Ip。艮期从事测井油气层评价工作。通信地址：300280天津市大港油田勘探开发研究院。电话：（022）63951165。Email：wushqin@petrochina．com．cn
