scholarly journals Technologies for the benefit development of low-permeability tight sandstone gas reservoirs in the Yan'an Gas Field, Ordos Basin

2019 ◽  
Vol 6 (3) ◽  
pp. 272-281 ◽  
Author(s):  
Xiangzeng Wang ◽  
Xiangyang Qiao ◽  
Naizhe Mi ◽  
Ruogu Wang
Keyword(s):  
Ordos Basin ◽  
Low Permeability ◽  
Gas Reservoirs ◽  
Tight Sandstone ◽  
Gas Field

Logging Identification Technology of Sedimentary Facies and Gas Layers within Low Pressure, Low Permeability and Low Abundance Gas Reservoirs: Example from SQW Block of the Sulige Gas Field, Ordos Basin, China

2012 ◽  
Vol 616-618 ◽  
pp. 96-99
Author(s):  
Fang Lu ◽  
Xin Jiang Du ◽  
Zhi Jun Mao ◽  
Yan Zhou ◽  
Yue Bin Cui ◽  
...  
Keyword(s):  
Ordos Basin ◽  
Sedimentary Facies ◽  
Low Pressure ◽  
Low Permeability ◽  
Braided River ◽  
Gas Reservoirs ◽  
Gas Field ◽  
Exploration Target ◽  
The Ordos Basin ◽  
Gas Potential

Sulige Gas Field is located in the Suligemiao area, northwest of the Ordos Basin, with a prospecting area of about 4×104km2. Owing to the strong heterogeneity in the SQW Block, one of exploration blocks in the Sulige Gas Field, remains reservoir characteristics of the gas field: lithologic gas reservoirs with characteristics of “three low” (low pressure, low permeability and low abundance). The He8 member of the Shihezi formation, the major exploration target, is deposited in braided river environment. The conventional logging data is very useful to indentify different facies and to estimate gas potential. The technology of discrimination with sedimentary facies and gas layers using logging data is established in this paper. We use the technology combining with AVO and other exploration methods to pick out 4 favorable exploration target areas with the success rate of more than 80%.

A New Method to Predict Favorable Gas-Rich Area in Tight Sandstone Gas Reservoir in Daniudi Area

2013 ◽  
Vol 295-298 ◽  
pp. 3328-3332
Author(s):  
Hai Ying Han ◽  
Zhi Zhang Wang ◽  
Xin Xiao Sun ◽  
Wei Jun Wang
Keyword(s):  
Ordos Basin ◽  
Gas Reservoirs ◽  
Tight Sandstone ◽  
Gas Reservoir ◽  
Gas Field ◽  
High Productivity ◽  
Integrated Method ◽  
Geological Information ◽  
Sedimentary Microfacies ◽  
Developing Area

Daniudi gas field is a tight sandstone gas field in the northeast of Ordos Basin. How to use the successful experience in developing area to predict favorable gas-rich area in other areas in this gas field is very important to the next exploration and development in this field. This paper proposes a multi-information integrated method to predict favorable gas-rich area. Firstly describe sedimentary microfacies by integrating seismic, logging and geological information; and then summarize and analyze the seismic reflection patterns of medium-high productivity wells; finally determine the favorable gas-rich area with the distribution of storage coefficient based on the previous analysis. The welltest of newly drilled wells shows that the coincidence rate of favorable gas-rich area predicted by this method could be up to 90%,and this method could be extended to use in the other tight sandstone gas reservoirs.

The influence of diagenesis on low-porosity, low-permeability gas reservoirs in the Sulige Gas Field (Ordos Basin, China)

2022 ◽  
pp. 191-215
Author(s):  
Xiuping Wang ◽  
Aiping Fan ◽  
A.J. (Tom) van Loon ◽  
Renchao Yang ◽  
Zuozhen Han ◽  
...  
Keyword(s):  
Ordos Basin ◽  
Low Permeability ◽  
Gas Reservoirs ◽  
Gas Field ◽  
Low Porosity

A Volumetric Model for Evaluating Tight Sandstone Gas Reserves in the Permian Sulige Gas Field, Ordos Basin, Central China

2019 ◽  
Vol 93 (2) ◽  
pp. 386-399
Author(s):  
Mingming CUI ◽  
Aiping FAN ◽  
Zongxiu WANG ◽  
Wanli GAO ◽  
Jinbu LI ◽  
...  
Keyword(s):  
Ordos Basin ◽  
Central China ◽  
Tight Sandstone ◽  
Gas Field ◽  
Volumetric Model

Main Controlled Elements for Accumulation of Ultro-Low Permeability Sandstone Oil Reservoir, Zhenjing Oilfield, Ordas Basin

2013 ◽  
Vol 868 ◽  
pp. 70-73
Author(s):  
Yi Wei Hao ◽  
Hai Yan Hu
Keyword(s):  
Oil And Gas ◽  
Sedimentary Basin ◽  
Ordos Basin ◽  
Low Permeability ◽  
Oil Reservoir ◽  
Tight Sandstone ◽  
Buoyant Force ◽  
Accumulation Mechanism ◽  
Oil And Gas Resources ◽  
Low Permeability Reservoirs

Ordos Basin is the second largest sedimentary basin in China with very rich oil and gas resources. The exploration targets are typical reservoirs of low permeability. To determine the accumulation mechanism of tight sandstone reservoir, thin section, SEM, numerical calculation were used. The result showed that sandstone should be ultro-low permeability reservoirs with the high content feldspar and lithic arkose or feldspathic litharenite. The reservoir became tight while oil filling, buoyant force is too small to overcome the resistance of capillary force. Therefore, overpressure induced by source rock generation is the accumulation drive force.

Influence of Back Pressure on Testing Starting Pressure Gradient in Low Permeability Gas Field

2012 ◽  
Vol 524-527 ◽  
pp. 1460-1464
Author(s):  
Jian Yan ◽  
Xiao Juan Liu
Keyword(s):  
Pressure Gradient ◽  
Gas Flow ◽  
Water Saturation ◽  
Flow Characteristics ◽  
Low Permeability ◽  
Gas Reservoirs ◽  
Gas Field ◽  
Outlet Pressure ◽  
Test Conditions ◽  
Starting Pressure Gradient

For the existence of formation water, the capillary force increases when the gas flow in the cores, so the flow may display starting pressure gradient. However, during the lab testing, sometimes it is found that the starting pressure gradient changes in different test conditions: when the outlet pressure is atmosphere, only the water saturation reaches critical value (Sw)c, the quasi starting pressure exists; but when the outlet pressure is not atmosphere; it is easy to find the quasi staring pressure in the same water saturation. And the quasi starting pressure under the later condition is larger than that in former condition. It is also found that the quasi starting pressures are both power function to the ratio of core coefficient and water saturation. The experimental results provide some theoretical references for recognizing the flow characteristics in low permeability gas reservoirs.

scholarly journals Prediction of hydrocarbon reservoirs within coal-bearing formations

2020 ◽  
Vol 17 (3) ◽  
pp. 484-492 ◽  
Author(s):  
Faqi He ◽  
Ying Rao ◽  
Weihong Wang ◽  
Yanghua Wang
Keyword(s):  
Gamma Ray ◽  
Ordos Basin ◽  
Low Frequency ◽  
Careful Analysis ◽  
Hydrocarbon Reservoirs ◽  
Seismic Profiles ◽  
Tight Sandstone ◽  
Reservoir Prediction ◽  
Gas Field ◽  
Geostatistical Inversion

Abstract This paper presents a case study on the prediction of hydrocarbon reservoirs within coal-bearing formations of the Upper Palaeozoic. The target reservoirs are low-permeability low-pressure tight-sandstone reservoirs in the Daniudi Gas Field, Ordos Basin, China. The prime difficulty in reservoir prediction is caused by the interbedding coal seams within the formations, which generate low-frequency strong-amplitude reflections in seismic profiles. To tackle this difficulty, first, we undertook a careful analysis regarding the stratigraphy and lithology of these coal-bearing formations within the study area. Then, we conducted a geostatistical inversion using 3D seismic data and obtained reservoir parameters including seismic impedance, gamma ray, porosity and density. Finally, we carried out a reservoir prediction in the coal-bearing formations, based on the reservoir parameters obtained from geostatistical inversion and combined with petrophysical analysis results. The prediction result is accurately matched with the actual gas-test data for the targeted four segments of the coal-bearing formations.

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