State Engineering Laboratory of Low permeability Oil and Gas Field Exploration and Development

Fengcheng, China

State Engineering Laboratory of Low permeability Oil and Gas Field Exploration and Development

Fengcheng, China
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He M.,State Engineering Laboratory of Low permeability Oil and Gas Field Exploration and Development | He M.,Petrochina | Lai X.,State Engineering Laboratory of Low permeability Oil and Gas Field Exploration and Development | Lai X.,Petrochina | And 12 more authors.
Natural Gas Industry | Year: 2015

Centralized and group well deployment and factory-like fracturing techniques are adopted for low-permeability tight sandstone gas reservoirs in the Sulige Gasfield, Ordos Basin, so as to realize its efficient and economic development. However, environmental protection is faced with grim situations because fluid delivery rises abruptly on site in a short time due to centralized fracturing of the well group. Based on the characteristics of gas testing after fracturing in this gas field, this a fracturing flowback fluid recovery and treatment method suitable for the Sulige Gasfield was developed with the landform features of this area taken into account. Firstly, a high-efficiency well-to-well fracturing flowback fluid recovery and reutilization technique was developed with multi-effect surfactant polymer recoverable fracturing fluid system as the core, and in virtue of this technique, the treatment efficiency of conventional guar gum fracturing fluid systems is increased. Secondly, for recovering and treating the end fluids on the well sites, a fine fracturing flowback fluid recovery and treatment technique was worked out with "coagulation and precipitation, filtration and disinfection, and sludge dewatering" as the main part. Owing to the application of this method, the on-site water resource utilization ratio was increased and environmental protection pressure concerned with fracturing operation was relieved. In 2014, field tests were performed in 62 wells of 10 well groups, with 32 980 m3 cumulative treated flowback fluid, 17 160 m3 reutilization volume and reutilization ratio over 70%. Obviously, remarkable social and economical benefits are thus realized. ©, 2015, Natural Gas Industry Journal Agency. All right reserved.


Wang D.,Petrochina | Wang D.,State Engineering Laboratory of Low Permeability Oil and Gas Field Exploration and Development | Zhang M.,Petrochina | Zhang M.,State Engineering Laboratory of Low Permeability Oil and Gas Field Exploration and Development | And 4 more authors.
Shiyou Diqiu Wuli Kantan/Oil Geophysical Prospecting | Year: 2014

To solve the problem of multi-wave seismic imaging, we adopt a few approaches such as converted wave static correction, multi-wave velocity joint analysis, and consistent processing techniques for multi-wave data processing in Sulige Gas Filed. Multi-wave data imaging is greatly improved. Based on petrophysical analysis, we use multi-wave AVO analysis, multi-wave joint prestack inversion, and cross plot technique to perform reservoir prediction. The results show that our approaches can greatly improve reservoir prediction and reduce multiple solutions of prediction with only P-wave.

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