Characteristics of Tight Oil in the Dolomicrite Reservoir: A Case Study of Xingouzui Formation, Jianghan Basin, China

2014 ◽  
Vol 522-524 ◽  
pp. 1223-1228
Author(s):  
Min Yue Zhou ◽  
Long Ming Wei ◽  
Ji Rong He ◽  
Qiu Ming Pei ◽  
Wei Li ◽  
...  
Keyword(s):  
Pore Structure ◽  
Oil And Gas ◽  
Physical Property ◽  
Source Rocks ◽  
Tight Oil ◽  
Oil Reservoir ◽  
High Porosity ◽  
Jianghan Basin ◽  
Development Prospects

Low-Xingouzui Formation II reservoir in the Xingou region of Jianghan Basin belongs to tight oil reservoir. By means of study about the geochemical characteristics of source rocks, lithology, physical property and pore structure characteristics, this paper confirms that the source rocks of Low-Xingouzui Formation II are mostly above medium in content of organic matter. The hydrocarbon source rocks are mainly of type II. The thermal maturity of most samples is immature-low mature. Dolomicrite and terrigenous clastic (intraclast) dolomite are the most favorable reservoir facies. The reservoir has mid to high porosity and extremely low permeability, and its space is dominated by dolomite dissolution with micro throat pore structure. This oil reservoir distributes widely and quasi continuous, while good conditions of petroleum formation exist. It could hopefully become new increasing point of Jianghan’s oil and gas output that has broad development prospects and studying value.

Hydraulic Fracturing of Ultrahigh Stress Tight Oil Reservoir - A Case Study of Yumen Oilfield in China

2016 ◽  
Author(s):  
Peng Yi ◽  
Weng Dingwei ◽  
Xu Yun ◽  
Wang Liwei ◽  
Lu Yongjun ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Tight Oil ◽  
Oil Reservoir ◽  
Tight Oil Reservoir

The Hayfield Sandstone Play: the characterisation of a Mesoproterozoic sourced, Proterozoic sandstone reservoired, tight oil and gas play in the Beetaloo Sub-basin

2020 ◽  
Vol 60 (1) ◽  
pp. 242
Author(s):  
Carl Altmann ◽  
Brenton Richards ◽  
Alexander Côté ◽  
Cassandra Bein ◽  
Elizabeth Baruch-Jurado ◽  
...  
Keyword(s):  
Marine Environment ◽  
Seismic Data ◽  
Oil And Gas ◽  
Tight Oil ◽  
High Porosity ◽  
Liquefied Petroleum Gas ◽  
Fine Grained ◽  
Gas Streams ◽  
Matrix Permeability ◽  
Reservoir Facies

The Hayfield Sandstone is a Neoproterozoic, 10–15 m thick, very fine- to fine-grained sandstone, interpreted to have been deposited in a shelfal-marine environment. The reservoir sandstone is characterised by high porosity and low matrix permeability, which is complimented by partially mineralised open fractures which may contribute significantly to overall system permeability. Hydrocarbon phase across the identified play fairway is interpreted to range from a gas with the potential for condensate and liquefied petroleum gas streams to a light, ~38 API gravity oil. The extent of the prospective play fairway and the distribution and connectivity of reservoir facies is poorly constrained due to a limited number of well penetrations and poor resolution 2D seismic data. From the wells drilled to date, the gross area of the prospective play fairway could be as low as 300 km2 or greater than 1500 km2.

Research on Types of Oil Reservoirs and Character of Oil-Water Distribution in Heidimiao Layer

2013 ◽  
Vol 772 ◽  
pp. 789-794
Author(s):  
Gui You Lv
Keyword(s):  
Water Distribution ◽  
Oil And Gas ◽  
Dominant Role ◽  
Three Dimensional ◽  
Physical Property ◽  
Research Area ◽  
Oil Reservoir ◽  
Well Testing ◽  
Testing Data ◽  
Oil Water

This paper takes Yingtai area which is located in the south of Qijia-Gulong sag and part of central sag area in the north of the Songliao Basin as the research area. Then combining all information of core, logging, three-dimensional seism and well testing data, it studies the reservoir type and oil-water distribution characteristics of Heidimiao by analyzing the comparison charts of sandstone, profile map of reservoir, T07 structure diagram, well testing data, stratum thickness, sandstone thickness, ratio of sandstone thickness to stratum thickness, porosity values, permeability contour maps. The reservoir lithology of Heidimiao oil layer is siltstone-oriented with poor physical property. The main controlling factor of oil-water distribution is the lithology, followed by the structure. Heidimiao oil layer mainly includes three types, lithological oil reservoir, lithological - structural oil reservoir and structural oil reservoir, among which lithological reservoir plays a dominant role. Its oil-water distribution is characterized by the pattern of upper-water and bottom-oil; when the fault acts as the pathway for the longitudinal migration of oil and gas, the pattern changes to the upper-oil and bottom-water. This research could provide reliable geological basis for the research of old well re-examination, favorable area evaluation and horizontal well drilling design.

Reservoir Characteristics of Buried Hill and Oil and Gas Distribution of Hailaer Basin - Case Study of Budate Formation of Sudeerte Oilfield

2014 ◽  
Vol 926-930 ◽  
pp. 4425-4428
Author(s):  
Hong Jun Fu
Keyword(s):  
Oil And Gas ◽  
Physical Property ◽  
Tectonic Stress ◽  
Dual Porosity ◽  
Weathering Crust ◽  
Gas Distribution ◽  
Mud Logging ◽  
Buried Hill ◽  
Structural High

Buried hill reservoirs are typically found in Sudeerte oilfield in Hailaer basin. In this paper, the lithology, physical property and electric property of buried hill reservoirs are studied incorporating core data, mud logging, wireline logging and seismic attributes data. The major reservoir types of Budate buried hill are confirmed to include porosity, fracture, cavern and dissolved pore, which belong to dual porosity reservoirs. Vertically, the reservoirs get worse with the increase of buried depth and are controlled horizontally by weathering crust position and tectonic stress, and locations nearby fractured belt and structural high positions are preferable places for the formulation of good reservoirs. Oil and gas within the reservoir mainly accumulated inside fractures and pores and reservoirs with plenty existence of fractures and pores have good oil and gas shows and vice versa.

scholarly journals Characteristics of micro- and nano-pores in shale oil reservoirs

2020 ◽  
Author(s):  
Debin Xia ◽  
Zhengming Yang ◽  
Tiening Gao ◽  
Haibo Li ◽  
Wei Lin
Keyword(s):  
Fractal Dimension ◽  
Pore Structure ◽  
Oil And Gas ◽  
Fractal Theory ◽  
Oil Reservoirs ◽  
Practical Significance ◽  
Oil Reservoir ◽  
Shale Oil ◽  
Structure Characteristics ◽  
Shale Oil Reservoirs

Abstract Porosity is the most common form of reservoirs, and its size, shape, and connectivity directly affect the capacity of oil and gas storage and production. To study the micro–nano-pore structure characteristics of shale oil reservoirs and quantitatively characterize its heterogeneity, this work uses high-precision high-pressure mercury intrusion (HPMI) experimental techniques to study the micro–nano-pore structure characteristics of shale oil, and based on the experimental data, fractal theory is used to quantitatively characterize its heterogeneity. The results of the study show that the micro–nano-pores in the shale oil reservoir are concentrated and continuous, and the pore radius is mainly distributed among the range of 30–500 nm, nanoscale pores are an important part of the pores of the shale oil reservoir. The fractal dimension of the shale oil reservoir is larger than the fractal dimension of typical tight oil reservoirs, indicating that the heterogeneity of shale oil reservoir is stronger. The research results have some theoretical and practical significance for the production of inter-salt shale oil reservoirs.

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