Reservoir Development Program Optimization And Procedure Technique Of Bohai Gulf Complex Fault Block

For high effetely development of Chenghai Oilfield, it is necessary to use seismic, geology, well log, well testing, producing test and pilot development materials to re-correlate, continuous study and timeliness adjust the reservoir characterization depend on new recognition of previous development pilot oilfield, thus it can be satisfied the adjustment requirement of producing horizon and production well pattern. And the Bohai gulf complex fault block reservoir development program optimization and procedure technique has been detailed studied case by 2nd zone of Chenghai oilfield in Dagang Oil Company. The second scenario of three Shahejie bottom lays three development scenarios has been development index compared as selected for the East Shahejie bottom lays reservoir recommended development plan. Finally according to the technology research, the results including:(1) It has generated a serial integrated research and optimization techniques for complex fault block reservoir, and which including:fine structural interpretation, seismic constrained multi-well inversion, fine sand characterizations, facies controlled 3rd geological modeling, evaluation and optimization techniques, reservoir engineering research and well placement arrangement.(2) According to reservoir analysis, it has deeply controlled the properties of reservoir properties (porosity, permeability, oil saturation), porosity structure, reservoir litho logy, liquid properties (crude oil and nature gas), structural properties, zonal distribution, pressure system, temperature system and oil& gas reservoir types. The structural interpretation indicates that 2nd zone of Chenghai Oilfield mainly locates in the structure of ZhangDong, and including three main faults, they are North ZhangDong fault, east ZhangDong fault and No.4 Hai well fault, and they commonly have characterization of large size, long geological actuation period and long fault displacement.(3) It has been achieved fine reservoir sand characterization depend on the study of reservoir inversion and sedimentary facies distribution, and the fine reservoir characterization finely defined the whole sub-zones oil area, thickness of single sand body and OOIP distribution for fine geological modeling. Mainly producing layers of 2nd zone of Chenghai oilfield are bottom layer of 1st Shahejie, top and bottom layers of 2nd Shahejie, top and bottom layers of 3rd Shahejie. The crude oil mainly reserved in good depositional and preserved reservoir area, and favorable reservoir area mainly concentrate in area of well ZH7, ZH5, ZH503, Zh15,Z2701. According to upper fine research, it has been generated a serial techniques of reservoir inversion, sand body characterization and OOIP distribution evaluation for complex fault block reservoir.(4) It has been achieved the whole geological model of 2nd zone of Chenghai Oilfield and wells zoning geological model (Zh27X1 well zone, ZH29X1 well zone, northeast and northwest 2nd zone of Chenghai oilfield), which including the model of structure, faults and reservoir properties (porosity, permeability, oil saturation). And finally it summed the method of geological model building, which similar to the properties of 2nd zone of Chenghai complex faults oilfield.(5) It built three reservoir development scenarios of similarly bottom layers of 2nd Shahejie reservoir, and according to the comparison of reservoir development scenarios, the development mode and development scenarios has been determined, and the scenario of 44 new wells (includes 28 oil production wells and 16 water injection wells) has been chosen as the best scenario, which fully support the 2nd zone of Chenghai Oilfield development.