The Tectonic Characteristic Of Dujiatai Reservoir And Beneficial Trap Prediction In Jin 39 Wellblock

In recent years,Since huanxi oilfield has entered into the later stage of development period,the production of main block is decreasing step by step,and the replacement of resources is insufficient so that the oil and gas production will continue to slide down.It is an extremely urgent mission to search for potential oil and gas reserves and new potential for exploration in the long-term developed areas.For this purpose,according to the actual situation,combined with the oil field's own production and development status,select found oil&gas showing or outputing well point at four section of Shahejie formation's Dujiatai reservoir in Jin 39 wellblock,to carry on the fine structure research,predict beneficial traps.In the face of the high maturity stage of exploration and development,it is no longer suitable to find the geologic structural oil and gas reservoir intuitively according to the original method.Therefore,it is necessary to comprehensively collect geological data in jin39 well area and conduct research in combination with the comprehensive study of various geological disciplines.Using the trademark of well logging,drilling and logging data,through the VSP logging results,skeleton synthetic seismogram and the conventional well logging curve method are provided,to the world series on top.The development and distribution of the reservoir were predicted by studying the sand body and sedimentary characteristics,well logging facies analysis and reservoir characteristics.On the basis of previous studies,carries on the structure to verify,and analyzes the reservoir types and distribution,forecast favorable traps.Through various methods,such as small bed comparison,well seismic calibration and combination of well seismic calibration,fine stratigraphic comparison,division and fine structural interpretation,the standard stratigraphic profile of well area was established,the structural features were redefined,the top boundary structural map and fault development map of each oil formation and the four sections of sand were compiled,analyzes the Dujiatai structure characteristics of the reservoir,reservoir types,determine oil and gas comes from yuanyang ditch sub-sag belt,fan delta system is the important reservoir in this area,and then analyzes the favorable target area and predicting favorable trap position,finally preliminary proposed three favorable traps.