Reservoir Fine Description of Complex Fault-block Oilfield in Re-development Phase
|School||Daqing Petroleum Institute|
|Course||Mineral prospecting and exploration|
|Keywords||Reservoir description Microfacies Reservoir heterogeneity Remaining Oil Distribution|
At present, most old oilfields in the \, production rate decreased. In this context , in order to improve the old oil field development in the latter part of the efficiency of mature oilfields proposed \\In this paper, Dagang Oilfield East Harbor pilot , well logging and seismic data , integrated application sedimentary petrology , reservoir geology and other disciplines theory, complex fault block oil fields around the geological features , mainly from the stratigraphy, tectonics , sedimentary , monosandbody characterize the internal structure , reservoir characteristics , reservoir , and several other aspects of the development process to describe the secondary geological characteristics and variation . First, according to the underlying data and log interpretation stratigraphic division and correlation of Fine implement stratigraphic framework ; based on seismic data , comparative data for individual well constructed system fault analysis ; core data using well facies , sand thickness data , logging facies division sedimentary facies , combined with dynamic data analysis monosandbody configuration ; based core experiment data, such as porosity, permeability , combined with sand thickness maps, sand shale interlayers in vivo characteristics of the reservoir ; then, based on log interpretation and testing data for reservoir characterization and development of reservoir characteristics before and after change analysis , the final thickness and bearing area under the effective single storage coefficient complete calculation of reserves , reserve changes for analysis ; By combining static and dynamic analysis of residual oil distribution and accumulation in the forecast surplus oil distribution area , reasonable mining opinions. Through analysis, the Dagang oilfield Port Minghuazhen an area divided into 79 small layer . Sure work area is fluvial sedimentary depositional environment . Divided into point bar , the final river , abandoned channel , crevasse splay , overbank sand, flood plains six kinds of sedimentary facies . Main reservoir for the point bar . Reservoir to fine feldspathic lithic sandstone , sorting better, mainly argillaceous cement , cement loose . High porosity and permeability pore type coarse throat .