蟠龙油田P3323井区长4+5储层特征研究  

Study on Reservoir Characteristics of Chang 4+5 in Well Area P3323 of Panlong Oilfield

作　　者：景正正 王桂成 JING Zhengzheng;WANG Guicheng(School of Earth Sciences and Engineering Shaanxi Key Laboratory of Petroleum Accumulation Geology,Xi′an Shiyou University,Xi′an 710065,China)

机构地区：[1]西安石油大学地球科学与工程学院/陕西省油气成藏地质学重点实验室,西安710065

出　　处：《重庆科技学院学报（自然科学版）》2022年第6期16-21,共6页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：陕西省自然科学基础研究计划项目“蟠龙油田蟠3323井区注水开发调整对策研究”(2017JQ4013)。

摘　　要：利用最新生产数据和测试资料,并结合取心薄片镜下观察,对蟠龙油田P3323井区的主产油层长4+5储层特征作了深入研究。经分析,其储层特征为:长4+5_(2)为主产油层,上覆的长4+5_(1)为较好盖层;地层中主要含细粒长石砂岩,填隙物中胶结物占比较大,结构成熟度较高;储层孔隙度介于1.50%~18.90%,平均为8.80%;储层渗透率介于(0.01~17.80)×10^(-3)μm^(2),平均为0.74×10^(-3)μm^(2);储层类型为低孔—特低孔、特低渗储层,主要影响因素有沉积相、成岩作用及其后期断裂活动;长4+5_(2)^(1)层的非均质性强于长4+5_(2)^(2)层,平面上长4+5_(2)层的局部差异较大,属强非均质性。长4+5_(2)层作为主要开发层位,其物性受相带控制作用的影响较明显,故后期可首选人工造缝增产措施,并结合孔渗分布适当优化注采剖面,以缓解因非均质性而导致的注采矛盾。Reservoir characteristics of the main producing layer Chang 4+5 in Panlong Oilfield P3323 area is studied by means of microscopic observation of core thin section,based on the latest production data and test data.The results show that the main oil layer in this area is Chang 4+5_(2),and the overlying Chang 4+5_(1) is a better caprock.It is mainly fine-grained arkose,and the cement in the interstitial material accounts for a large proportion,with high structural maturity.The porosity distribution range of the reservoir is between 1.50%and 18.90%,with an average of 8.80%.The permeability is mainly between(0.01-17.80)×10^(-3)μm^(2),with the average of 0.74×10^(-3)μm^(2).The reservoir is classified as low porosity ultra-low porosity and ultra-low permeability reservoir.The main influencing factors are sedimentary facies,diagenesis and its later fault activity.In terms of interlayer,the heterogeneity of Chang 4+5_(2)^(1 )is stronger than that of Chang 4+5_(2)^(2).On the plane,the local difference of Chang 4+5_(2) reservoir changes greatly,which also belongs to strong heterogeneity.As the main development horizon,the physical properties of Chang 4+5_(2 )are obviously affected by the phase belt control.Therefore,in the later stage,the stimulation measures of artificial fracturing can be preferred,and the injection production profile can be properly optimized in combination with the distribution of porosity and permeability to ease the injection production contradiction caused by heterogeneity.

关 键 词：蟠龙油田 长4+5储层 储层特征 非均质性 

分 类 号：P618[天文地球—矿床学]