| Shale oil is one kind which exist in dense,low porosity and low permeability shale of petroleum resources. Worldwide, shale oil resources are very rich, but because of its exploitation is difficult, so a considerable amount of unconventional resources has been ignored by all countries. Since the U.S. shale gas revolution, oil shale can be a huge potential for development have gradually been accepted by the world, the world around had been carrying out reconnaissance of oil shale resources. Since2006, China’s oil shale resources in the preliminary exploration shows that the Chinese also has a considerable amount of oil shale resources, the potential were far more than conventional oil and gas resources.Based on the overview of shale oil exploration of the status at home and abroad, it shows a shale oil development prospects. Changling area has rich resources, but proven degree is low. So shale oil resource assessment in Changling Depression will not only develop the strategy of Northeast China petrochemical oil branch company but also provide it with the basis for long-term development plan for oil and gas resources of shale, the preferable block result will provide the Northeast China petrochemical oil branch company with technical support for exploration of shale oil and gas exploration and development area.The main research area can be divided into four parts:SuoTu area, ChaGanHua-XinAn town area, HuaChang-QianQiHao regions and HuaXing town Yang’s store area.Firstly, this paper uses the existing geological and logging data, describes the shale space distribution of Nunjiang Formation member Ⅱ and Ⅰ and Qingshankou Formation member Ⅰ.The shale of Nunjiang Formation member Ⅱ and Ⅰ are a good target because the thickness are big and stable while the the dark mudstone thickness is also large. The sand thickness of Qingshankou Formation member Ⅰ is large, but the shale on the top is also a good target.Key geochemical parameters (Ro, TOC, S1and chloroform bitumen "A") can not only used for computing resources, but also evaluate the shale hydrocarbon generation ability in the study area. In combination with well logging data and analysis of test data, establishing the calculation model of each key geochemical parameters with△logR method, we can get the plane distribution of those parameters.According to the above shale thickness distribution and organic geochemical parameters,and based on the evaluation criteria of shale oil and gas, systematically classified the shale oil evaluation unit.The changling depression could be vertically divided into three series:Nunjiang Formation member Ⅱ and Ⅰ, Qingshankou Formation member Ⅰ. In the plane, the unit area evaluation of the Nunjiang Formation member Ⅱ and Ⅰis the most widely,over the entire mining area.Whlie the distribution of qingshankou formation period of evaluation unit only in Zhenglan,SuoTu and YaoTingTai areas.A comprehensive probability method, volume method of chloroform asphalt and S1method calculate resource, the volume method is adopted in chloroform bitumen A method to calculate the result more accurate. So, this paper uses the volume calculation results to make comprehensive evaluation.This article mainly detailed analysis of changling resources prospect from the hierarchical resource, recoverable resources, shale oil abundance.Using TOC and chloroform bitumen "A" and S1correlation diagram to set up the classification standard of shale oil resources in changling depression, the oil shale resources have been divided into three levels by the difficulty of the shale oil recoverable:Nunjiang Formation member Ⅱ and Ⅰare full of fiest level(the most accessible) resource,while the most abundant resources in Qingshankou Formation member Ⅰ are the second level,and the first level are less.Various conditions comprehensive is used to calculat mud shale recoverable coefficient for each evaluation unit,and then calculate recoverable resources in changling depression. Resource calculation results show that the recoverable resources of Nunjiang Formation member Ⅱ are6.5043million tons, the recoverable resources of Nunjiang Formation member Ⅰ are8.0187million tons,and the recoverable resources of Qingshankou Formation member I are1.2471million tons.Shale oil abundance is good for exploring instruct function.The shale oil abundance of Nunjiang Formation member Ⅱ and Ⅰ are higher,while it would be lower of Qingshankou Formation member Ⅰ.The highest abundance area could be YaoTingTai among those Formation.Based on the above resource analysis,the shale oil of Nunjiang Formation member Ⅱ andⅠis very rich in resources, and much greater than the shale oil reserves of Qingshankou Formation member Ⅰ.Oil shale comprehensive district is the most straightforward help for exploration and deployment. This article uses two guidelines to evaluate district.The first will divided the evaluation area into four categories, namely Ⅰ、Ⅱ、Ⅱ2and Ⅲ. District queue from two aspects:shale oil enrichment probability and resource evaluation and value evaluation. Probability of shale oil enrichment could mark from hydrocarbon generation conditions, preservation conditions and degree of the oil found in weight.The value analysis from recoverable resources condition and resource quality and size.Many factors comprehensive results show:ChaGanHua-XinAn town (Nunjiang Formation member Ⅰ) ranked first, followed by ChaGanHua-XinAn town (Nunjiang Formation member Ⅱ). Comprehensive resources of shale gas enrichment probability and value analysis that ChaGanHua-XinAn town (Nunjiang Formation member Ⅰ) as Class Ⅰ block. ChaGanHua-XinAn town (Nunjiang Formation member II), the SuoTu (Nunjiang Formation member Ⅱ), the SuoTu (Nunjiang Formation member Ⅰ) of Ⅱ1block. While HuaXing town-Yang’s store (Nunjiang Formation member Ⅱ),HuaChang-QianQiHao regions (Nunjiang Formation member Ⅱ), HuaChang-QianQiHao regions (Nunjiang Formation member Ⅰ),HuaXing town-Yang’s store (Nunjiang Formation member Ⅰ), ChaGanHua-XinAn town (Qingshankou Formation member Ⅰ),the SuoTu (Qingshankou Formation member Ⅰ) and HuaXing town-Yang’s store (Qingshankou Formation member Ⅰ),and so on,are Ⅱ2blocks.The second approach is based on its resources to research is divided into three levels core (target) area, favorable area and vision area. This method is a kind of multi-factor overlay technique。 It makes selection criteria from the organic matter abundance, organic matter maturity, thickness, buried depth and the surface condition of the shale five aspects.The result shows that:Nunjiang Formation member Ⅱ shale oil development is divided into two levels:prospects and favorable areas. Favorable area is located in the southwest YaoTingTai,rest are prospects. Nunjiang Formation member and Ⅰ shale oil favorable areas distributed in two areas:the east SuoTu and southwest YaoTingTai, and the remaining area is also prospective areas.the shale of Qingshankou Formation member Ⅰ are low organic matter content, and thickness generally less than30m, so the overall prospects are.Two methods of selection results both show that:the development prospects of Nunjiang Formation member Ⅱ and Ⅰ, some stronger than the overall of Qingshankou Formation member Ⅰ. ChaGanHua-XinAn town and SuoTu area both are the ideal exploration targets. |
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