Research and practice of stereoscopic evaluation of shale oil in the fourth-third member of the Paleogene Shahejie Formation in Jiyang Depression
Jiyang Depression is a typical continental fault basin in eastern China.A set of thick medium-low maturity shale oil has been identified in the fourth-third member of the Paleogene Shahejie Formation,with resources of more than 100×108t,which is being evaluated and tested at present,showing broad exploration and development prospects.Based on the characteristics of complex lithofacies,diverse reservoir spaces,high heterogeneity,and large source rock thickness of continental shale oil,seismic data,mud logging,wireline logging,coring,and laboratory test data are combined to conduct"four-property"evaluation of source rock,including favorable lithofacies,reservoir physical properties,oil-bearing property,movability,and fracability.The deployment of appraisal wells and pilot tests of well group enable to develop an evaluation technology with the core of stereoscopic sweet spot evaluation,stereoscopic well network optimization,and stereoscopic horizontal well fracturing,and resource potential and technological adaptability have been determined,which provide important support for optimally selecting production zone and achieving large-scale development and production capacity construction.The stereoscopic evaluation tests have been conducted in Boxing,Niuzhuang,and Minfeng areas,confirming the reliability of sweet spot evaluation standards,rationality of well spacing and layer spacing,and adaptability of fracturing technology,and helping to build the first shale oil pilot test well group of Sinopec with a level of 10× 104t,which effectively support the high-efficiency construction of national shale oil demonstration zone in Jiyang continental fault lake basin.
Jiyang Depressionshale oilstereoscopic evaluationdevelopment technological policydevelopment practice
NETL
NSTL
万方数据
