Geomechanical Anisotropic Method Increased Fracturing Efficiency in Tight Oil Production: A Case Study of Yanchang Formation, Ordos Basin

2019 ◽  
Author(s):  
Shengli Xi ◽  
Yuting Hou ◽  
Xianwen Li ◽  
Xifeng Hu ◽  
Peng Liu ◽  
...  
Keyword(s):  
Ordos Basin ◽  
Oil Production ◽  
Tight Oil ◽  
Yanchang Formation

Geomechanical Anisotropic Method Increased Fracturing Efficiency in Tight Oil Production: A Case Study of Yanchang Formation, Ordos Basin

2019 ◽  
Author(s):  
Shengli Xi ◽  
Yuting Hou ◽  
Xianwen Li ◽  
Xifeng Hu ◽  
Peng Liu ◽  
...  
Keyword(s):  
Ordos Basin ◽  
Oil Production ◽  
Tight Oil ◽  
Yanchang Formation

Fracture responses of conventional logs in tight-oil sandstones: A case study of the Upper Triassic Yanchang Formation in southwest Ordos Basin, China

AAPG Bulletin ◽  
2016 ◽  
Vol 100 (09) ◽  
pp. 1399-1417 ◽  
Author(s):  
Wenya Lyu ◽  
Lianbo Zeng ◽  
Zhongqun Liu ◽  
Guoping Liu ◽  
Kewei Zu
Keyword(s):  
Ordos Basin ◽  
Upper Triassic ◽  
Tight Oil ◽  
Yanchang Formation ◽  
Conventional Logs

scholarly journals Staged Fracturing of Horizontal Wells in Continental Tight Sandstone Oil Reservoirs: A Case Study of Yanchang Formation in Western Ordos Basin, China

2021 ◽  
Vol 9 ◽  
Author(s):  
Dingxue Zhang ◽  
Yunfei Liu ◽  
Hui Luo ◽  
Shixue Cao ◽  
Jingxin Cao ◽  
...  
Keyword(s):  
Horizontal Well ◽  
Ordos Basin ◽  
Production Capacity ◽  
Oil Production ◽  
Horizontal Wells ◽  
Oil Reservoirs ◽  
Tight Oil ◽  
Tight Sandstone ◽  
Yanchang Formation ◽  
Well Pattern

Continental tight sandstone oil reservoirs have strong heterogeneity, and staged fracturing technology of horizontal well is a crucial measure for successful development of oil and gas. In this study, the fracturing effect of horizontal wells in tight oil reservoirs of Yanchang Formation in the western Ordos Basin was systematically studied using the rock mechanics, array acoustic and microseismic testing data and the staged fracturing technology. The hydraulic fracturing method was used to calculate the horizontal principal stress difference (σH-σh). It showed that as the buried depth increases, σH-σh tends to decrease first and then increase. Small-scale fracturing should be used for areas with smaller σH-σh values. Fracturing construction parameters have an impact on oil production capacity, which is mainly manifested in that the usage of prepad fluid, sand-carrying fluid and proppant is proportional to productivity. Excessive displacement and construction scale should not be used in the fracturing process, and the fracture height of the target layer should be strictly controlled within the range of 26 m. The analysis of the “rupture points” in the fracturing curves shows that wells with relatively obvious rupture points usually have a higher oil production capacity. These wells have a good fracturing effect and an effective fracture network was formed in the tight oil reservoir. The optimization simulation results of the horizontal well pattern form show that the seven-point combined well pattern is the best well pattern, which is suitable for the development of tight oil sandstone in the Yanchang Formation.

Natural fractures in tight-oil sandstones: A case study of the Upper Triassic Yanchang Formation in the southwestern Ordos Basin, China

AAPG Bulletin ◽  
2019 ◽  
Vol 103 (10) ◽  
pp. 2343-2367 ◽  
Author(s):  
Wenya Lyu ◽  
Lianbo Zeng ◽  
Sibin Zhou ◽  
Xiaosheng Du ◽  
Dongling Xia ◽  
...  
Keyword(s):  
Ordos Basin ◽  
Upper Triassic ◽  
Tight Oil ◽  
Natural Fractures ◽  
Yanchang Formation
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