Restoration of the Paleo-Provenance of the Es12 in the Eastern of Shijiutuo Uplift and Its Control on Reservoir
Du Xiaofeng
Pang Xiaojun
Wang Qingbin
Song Zhangqiang
Ma Zhengwu
Abstract：The restoration of the original eroded landforms of the source area and its association with sand bodies and high quality reservoirs are very important parts of the Source-to-Sink system analysis.Based on the drilling data,3-D seismic data and other experimental analysis,the distribution of the paleo-provenance of the reservoirs of the Es12 in the eastern of Shijiutuo uplift was restoredin this study,using statistical method.The paleo-provenance's control on the reservoir was discussed as well.The results suggest:(1) The near-source fan-delta sandstone and conglomerate reservoirs in the study area received sediments.The parent rocks of the paleo-provenance in the eastern sub-uplift were Cretaceous acidic igneous rocks while the parent rocks of the paleo-provenance in western sub-uplift were Mesozoic clastic rocks with thin interlayers of intermediate-acidic igneous rocks,which were totally different from the residual bedrock.(2) Due to differences of the mother rock,the igneous rocks of the eastern sub-uplift were more likely to be eroded and formed large-scale sandstone and conglomerate.(3) The reservoir physical properties of the study area were affected by the source rock lithology and reservoir diagenesis.The eastern reservoirs were characterized by high content of the acid igneous rocks,gravels and other soluble components and coarse grain size.The interstitial substance was carbonate cements.In the process of diagenesis,the intermediate-acid igneous rocks and gravels were susceptible to the strong dissolution of organic acids,leading to the development of secondary pores.However,the reservoir featured low porosity and low permeability due to the further cementing of strong carbonate minerals.The western reservoirs were characterized by high content of refractory components such as metamorphic rocks and quartz,with clay as the interstitial substance.The primary porosity was preserved to be the dominant porosity,the reservoir featured medium-high porosity and high permeability.The results of this study are useful for sandstone and conglomerate reservoir prediction.
Keywords：Es12paleo-provenancesandstone and conglomeratereservoirShijiutuo upliftBohai Seapetroleum geology
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：13( 1897-1909 )