Research On Reservior Characteristics And Residual Oil Of Chang2 In Fengfuchuan 1230 Wellblock

Ordos basin is one of the earliest basins found that contains oil in China, and it is also the second largest basin containing rich oil and gas. Fengfuchuan oilfield is located in the eastern shanbei slope of ordos basin in the southern slope,Oilfield development since 2002, 2004, the highest annual output 300000 tons, oil production in 2009 fell to 67000 tons, 2010 an annual output of 60000 tons of crude oil output. With the advance development, under the new resources limited block problem, the original old piece of re-recognition and fine management is necessary for stable technical direction.Thesis selects typical Chang 2 reservoir of 1230 wellblock in Feng fuchuan oilfield as the research object, From the analysis of extra-low permeability reservoir geological evaluation, to carry out the objective interval in the study area formation, structure, sedimentary microfacies, diagenetic facies, sand body distribution, reservoir effective thickness, distribution of geological reserves, Finally through the numerical simulation research and determine the research district 2 reservoir residual oil distribution. To effectively adjust the enrichment region remaining oil distribution, thus, providing important guarantee.1230 wellblock for lithologic reservoir, tectonic effect on control of the reservoir is not obvious, as the delta plain sedimentary, including distributary channel are favorable for oil and gas gathering place, the study area technical recoverable reserves of about 24.39 x 104 t. According to the results of geological modeling and reservoir numerical simulation, the district 21-2 is still the main, 21-3, Chang 21-4 times; 21-1 Chang residual oil is less.