The Geologic Reservoir Description Of Chen 3 Fault Block, Chenbao Oilfield

The Chishan group reservoir of Chen 3 fault-block,Chenbao oil field is a low permeable sublayer reservoir which below to the Mesozoic Erathem. Although extracted so many years, it had lots of problems which has affected the tapping of the remaining oil. Just like the geological features are not clear, the simple research of sedimentary facies, the complicated relationship between the water and oil and so on.In view of the problem of oil field at present, the paper has conducted the system research to the research-area by taking the sequence stratigraphy, the sedimentology, the oil well logging geology and so on as the instruction, taking the modern oil deposit description technology as the method. Mainly include following contents:(1)The paper has carried on the fine stratum division contrast and the reexamination to the Chen 3 Chishan group stratum, has established the research area isochronism sequence stratum rack, and has determined the goal stratum in the plane and the section plane distributed rule.(2)It has researched the subzone sandstone top's micro-structural types, the characteristic and the combination relations, and has clarified the research area Chishan group plane of unconformity structure characteristic and the subzone granulated substance body top structure characteristic.(3)Through to studies the area the deposition background, the environment of deposition and so on to carry on the investigation and study work, take the core sample observation, the thin slice appraisal, the oil well logging distinguishes and so on as the method, paper has carried out the sedimentary facies research, had known accurately the work area goal level deposits respectively micro distributes the rule, has established the depositional mode.(4)Based on carried out the reservoir non-isotropic research and separates the band research, ,the paper clarifies the reservoir plane mop rule and the connected relation and the initial perquisite distribution relations.(5)Summarized the Chen 3 Chishan group reservoir's main geological feature, and in foundation of the geological research, uniting the oil field's production performance material and each kind of test material, it has clarified the Chen 3 Chishan group perquisite law of motion and the distribution characteristic of the remaining oil, and the paper also has calculated the remaining reserves, which builds the foundation of the horizontal well's design.(6)Carried on the preliminary design to the horizontal well, according to the granulated substance body mop and the plane of unconformity transfusion characteristic, the paper proposed two set of horizontal well development design proposal, simultaneously, has analyzed the risk of exploitation.