Time filter

Source Type

Bai R.,Research Institute of Yangchang Petroleum | Huo W.,Research Institute of Yangchang Petroleum | Zheng Y.,Research Institute of Yangchang Petroleum
Geological Bulletin of China | Year: 2013

This paper discusses the reservoir modeling technology used in the Chang 63 research of Heshui area in Ordos basin. According to drilling and core analyses and synthetically using the various facies characteristics, such as palaeontologics characteristics, deposition textures, and structure features, this paper points out that the study area belongs to the braided delta front, and analyses the four kinds of sedimentary mirofacies. On the basis, structural model and sedimentary microfacies model are builded by stochastic technology. 3D physical model is builded by lots of indicators. The refined characteristics of such physical parameters as porosity and permeability in 3D area were described by this way. The modeling results show that 3D modeling can show the facts better, and it can provide a reliable basis for oil pool digital simulation, residual oil prediction, adjustment and exploitation.

Bai R.,Northwest University, China | Zhang J.-G.,Northwest University, China | Sun B.-H.,Research Institute of Yangchang Petroleum | Zhu F.-Q.,Zhiluo Oil Production of Yangchang Petroleum
Geological Bulletin of China | Year: 2013

According to physical property analysis, mercury injection, cast section SEM and X-ray diffractions, the authors studied the diagenetic features of Chang 6 reservoir in the Zhiluo oilfield of northern Shaanxi, and have reached the conclusion that Chang 6 reservoir belongs to the "A" stage of late diagenesis. The impact and consolidated filling have destroyed the porosity of the sandstones. Carbonate, hydrosyalite and quartz-feldspar overgrowths were the main cements that reduced the reservoir quality of the sandstones. Thin chlorite film around detrital grains prevented overgrowth of part of quartz and feldspar and precipitation of carbonate cements, thus preserving a part of primary pores. Dissolution produced secondary pores and improved the physical property. Four kinds of diagenetic facies were recognized in the study area. There exists intimate relationship between qualified reservoirs and diagenetic facies: the physical properties of secondary pore diagenetic facies are the best, followed by chlorite cementation facies. These facies constitute the favorable diagenetic facies for the reservoir development.

Bai R.,Research Institute of Yangchang Petroleum
Geological Bulletin of China | Year: 2012

The sedimentary environment of Permian Haersuhai Formation in Yagan area of Ejin Banner was analyzed and the evidence for evaluation of oil/gas geologic conditions of Carboniferous-Permian was provided. The sedimentary environment was studied on the basis of lithology, paleontology and sedimentary structure, in combination with the content and ratios of trace elements as well as geochemical parameters of saturated hydrocarbon by gas chromatography. The study shows that there was a large-scale regression in Yingen-Ejin Banner basin in late Middle Permian period. Marine deposits of the Upper Permian Haersuhai Formation are mainly developed in Ejin Banner -Yangan-Hangwula area. Sediments consist of pyroclastic rock and clastic rock intercalated with a small amount of carbonate rock. It is concluded that the Permian Haersuhai Formation in Yagan area was formed in an offshore-epeiric sea- continental/oceanic alternate environment characterized by brackish water.

Discover hidden collaborations