Research On Oil Shale Resource Evaluation And Evaluation Methods In Northern Of Northeast China

Oil shale, considered as a kind of important alternative energy, can be used to obtain shale oil and affiliated products by dry distillation, serving as fuel to generate electricity, heat and transportation. The waste residue from oil refining and power generation can also manufacture building materials, cement and chemical fertilizer, or extract chemical products and metals. Currently, with the increasing demand for energy resources, oil shale has aroused much attention due to its enormous potential value in comprehensive utilization. China is rich in oil shale resource, possessing 719.9 billion tons, which is equal to 47.6 billion tons of shale oil resources. Oil shale will become an important supplement resource for oil and gas, which investigation and exploration will inevitably bring about the climax of evaluation research.Supply and demand situation for oil and gas resources in China is becoming increasingly severe, and there is an urgent need to strengthen the strategic survey and evaluation for oil and gas resources. However, no unified evaluation method for oil shale resources has been proposed in China yet. From 1951 to 1999, prediction programs for oil shale resource were organized for four times, which brought out significant inconsistent figures and resource types, just the index of oil yield for instance, it showed that there exist great differences in previous results, which leaded to difficult comparison between domestic and international application.A new turn of national oil and gas resource evaluation was organized by Land and Natural Resources, the State Development and Reform Commission and the Ministry of Finance in 2003, oil shale resources evaluation was listed in it. Under such situation, this paper developed the research on the evaluation system of oil shale resource, According to "General geological exploring principles for solid mineral prospecting" (GB/T13908- 2002), the "solid mineral resources/reserves classification" (GB/T17766-1999) and other norms, also in the light of coal resource evaluation standards and international practices and prospecting and development status quo of oil shale resources in China, this paper firstly established the evaluation method system of oil shale resource. The system includes evaluation parameters, selecting principles, evaluation of the term definitions, the classification of resources / reserves types, evaluation methods and processes, research on technical coefficient, creating optimized methods of prospecting and exploring. The system is consistent with solid mineral characteristics and mineralization laws, also corresponds to oil and gas resource evaluation, provides standards for oil shale resource evaluation, and has been successfully applied to the state's major special projects "national assessment of oil shale resources ".The geology, economy and feasibility factors were taken into full consideration in classification of resource/reserve types, and 3D classifying standards was applied, 5 series were generated: oil shale/ shale oil resources, technical resources of oil shale / shale oil and recoverable shale oil resources, which can be further classified into more than 30 types , so that the result was not only in line with the classification standards of solid mineral resources/reserves, but also consist with the conventional oil and gas resource evaluation. Estimation parameters of oil shale resource can be identified as mining seam thickness, effective area and ore body weight, their valuation standards and selection principle were unified, estimation methods and its process, which refer to single block serving as the basic unit were adopted, enabling evaluation results more scientific credible.Oil shale resources can be classified and evaluated according to different resources /reserves types, different geological reliabilities (predictable, inferred, controlled and proven), different economic significances (intrinsic economy, sub-marginalized economic, marginalized economic and economic), different layers (the Upper Paleozoic, Mesozoic and Cenozoic), different oil yield (wt%) (3.5%<ω≤5%, 5%<ω≤10%,ω>10%), different depths (D≤500m, 500m