Zhidan Yongning Chang 2 Reservoir Enrichment Regularity Study Long A Little Garden Area

Shao Yuanzi oilfield administrative area belongs to the Zhidan Shanxi province, is located in the county west slightly north of paper lane township, about 15 km away from the county seat as the crow flies, sandwiched between Zhou He and luohe.Research scope Han Laowan, east temple HuYaoxian, west check four trenches HuYaoxian, stockade, bay, the south temple Zhao Zhuang, north Bai Yinhe, a little garden, and area of 180 km2.Involved in the research area specific azimuth see attached figure 1-1, covers an area of about 36 km2Ordos basin is a bit of yanchang formation in the garden has good birth, reservoir and caprock, lithologic trap of well developed;Extended set of lake shoreline change affects slightly the garden area extended group in the development of reservoir, the sandstone development zone strictly controls the distribution and quality of oil and gas, delta plain distributary channel sand body and delta front mouth bar, underwater distributary channel sand body is favorable reservoir of oil and gas gathering in this area.A little garden area of yanchang group 2 reservoir is the major reservoir, Chang6, Chang 3 as auxiliary reservoir in this area.Extended group 6 for lenticular sandstone reservoir and reservoir types are mainly sandstone updip pinchout reservoir and sandstone updip dense shade reservoir, Chang2, Chang 3 reservoir types are mainly sandstone updip pinchout reservoir, the tight sandstone updip direction block reservoir compaction structure, lithologic reservoir and differences.The study on the existing research results and the premise of a large number of basic data, application of sedimentology, reservoir geology, geophysical well logging methods such as theory, basing on the Mesozoic ordos basin regional geological background, focusing on a long 2 garden area reservoir enrichment regularity study, comprehensive evaluation of the formation of long 2 reservoir, sedimentary system and reservoir characteristics.On this basis, find control research district 2main control factors of reservoir oil and gas enrichment.Focuses on the extended 2 reservoir group leader, to the research district 2 sedimentary facies, reservoir and reservoir forming factors are analyzed.Find the enrichment regularity, district 2 reservoir predicting favorable area, provide the basis for evaluation and optimization exploration targets.Through comprehensive analysis, the Chang2 reservoir reserves calculation result is 2327×104t, reserves abundance of 56.6 × 104 t/km2, is a medium-sized low abundance oil fields, at the same time calculating recoverable reserves of 279.2 x 104 t, the remaining recoverable reserves of 269×104t, through in-depth analysis shows that a little garden in oil field for the shallow, low yield, low abundance of medium-sized oil fields.