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Chen G.-H.,China University of Petroleum - East China | Zhang L.,China University of Petroleum - East China | Song G.-Q.,Geological Science Research Institute of Shengli Oilfield | Sui F.-G.,Geological Science Research Institute of Shengli Oilfield | And 2 more authors.
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | Year: 2010

According to the logging response characteristics of unconformable vertical structure, manifold mathematical statistics methods of optimal segmentation and principle component analysis were applied to ascertain the unconformity depth and to extract the comprehensive parameters which are used to identify the unconformable vertical structure. And then the crossplot analysis method was used to recognize the unconformable vertical structure. The logging data of fifty wells of Tertiary system in Jiyang depression were processed and the unconformable vertical structures were divided by this method. The results agree well with the core analysis data, which proves that using logging data to identify the unconformable vertical structure is feasible. This method provides a new idea to research the unconformable vertical structure. Source


Li S.,CAS Guangzhou Institute of Energy Conversation | Li S.,China University of Petroleum - East China | Zhang L.,China University of Petroleum - East China | Jiang X.,Geological Science Research Institute of Shengli Oilfield | Li X.,CAS Guangzhou Institute of Energy Conversation
Petroleum Science and Technology | Year: 2013

A new one-dimensional experimental system for natural gas hydrate (NGH) exploitation is designed, which is used to study the formation and dissociation processes of NGH. NGH is formed in the sand-packing tube, and then hot-brine is injected into the tube to study the thermal dissociation characteristics. The injection parameters that influence gas production rate and energy efficiency are analyzed. The results show that the higher the injection temperature and injection rate are, the higher the gas production rate is. In addition, the most sensitive parameter, which influences the energy efficiency of thermal stimulation is the hot-brine temperature, followed by the hot-brine injection rate and injection time. This study provides an experimental basis for further study on NGH exploitation in the future. © 2013 Taylor & Francis Group, LLC. Source


Li C.,China University of Petroleum - East China | Chen S.-Y.,China University of Petroleum - East China | Zhang P.-F.,Geological Science Research Institute of Shengli Oilfield | Zhang Y.,China University of Petroleum - East China | And 2 more authors.
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | Year: 2010

On the basis of lateral correlation of sedimentary facies in Caledonian strata on both sides of Jiangshan-Shaoxing fault, the distributions of moraine conglomerate and granites in Sizhoushan, Guiyang and Songshan, Fenyi were studied, and the tectonic attribute of South China Caledonian was discussed. The results indicate that there is no discontinuity of facies in Caledonian strata across the fault zone, but interdigitation of facies in the Nanhua-Cambrian system, and conformity of facies in the Lower Ordovician. The sources of Yangtze Block and Cathaysia Block are linked and there is no ocean between the two Blocks, evidenced by the finding of distal turbidites interbed within marine moraines developed on Yangtze Block and marine moraines interbed within thick turbidites on Cathaysia Block. South China Basin is not an original ocean, but a rift trough with transitional crust as basement, developed through finite extension on continental crust basement. Source


Li F.,Geological Science Research Institute of Shengli Oilfield | Hou J.,China University of Petroleum - East China | Qiu M.,China University of Petroleum - East China | Meng X.,Geological Science Research Institute of Shengli Oilfield | And 2 more authors.
Procedia Engineering | Year: 2012

We established a CT experimental method for the study of the water-oil displacement at pore scale. The microscopic core model made up of reservoir coring materials could truthfully reflect the surface property and pore structure of reservoir rocks. We scanned the core model at different water flooding stages using SkyScan1174v2 CT scanner, and high resolution images were obtained. The present paper adopted a new image segmentation method, which depends on the discriminatory analysis constrained by the measured porosity and oil saturation. This new method improved the accuracy of image segmentation. We utilized the new algorithm to carry out the segmentation of pores and residual oil from the scanning images. The segmentation results were in agreement with those measured from the core experiments. © 2011 Published by Elsevier Ltd. Source

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