Research On Gas Reservoir Characteristics Of Q1Period In Wangfu Area

Wangfu depression is an important oil and gas exploration in the southeast uplift ofSongliao Basin. In order to understand the whole clastic gas reservoir potential of Quantougroup in Wangfuarea,the latest theories and methods such as sequence stratigraphy,sedimentology and seismic stratigraphy are usedin the paper, using analysis information suchas seismic, well logging, mud logging and core, to carry out analysis and research ofaccumulation conditions, accumulation main controlling factors and accumulation model inthe region, forming a series of studies of stratigraphic classification and correlation, structuralinterpretation, sedimentary characteristics, reservoir characteristics.At the same time, thefavorable prediction work in the area is carrie out preparing for the next step of builddingcapacity quicky.At first, this study is based on seismic interpretation and made accurate calibration forthe seismic reflection layer of Quantou group,completed the fine interpretation forthree-dimensional seismic data, developed two graph structure in the top and bottom ofQ1period.After as a guide of sequence stratigraphy theory, based on seismic, cores, logs andother information,Q1period in Wangfu1area was divided into five cycles, Q1period inChengshen2area was divided into four cycles and earthquake sequence stratigraphicframework was built for the overall, unified, fine contrast. On this basis, through the analysisof the deposition of the background and the sedimentary facies mark such as mudstone color,lithology, clastic composition and particle size distribution, the depositional environmentandmicrofacies typeswas determinedin the study area and a typical measurement well-phasemodeis established, flat sedimentary microfacies were portrayed. Finally, on the basis of thestructural characteristics,sedimentary characteristics and reservoir characteristics of Q1periodin Wangfu area,we analizedsource-reservoir-cap characteristics,confirmed the maincontrolling factors of hydrocarbon accumulation and analyzed the accumulationcharacteristicsthrough the reservoir profiling, then selected a favorable explorationtargetsandproposed wells recommendations.