China University of Petroleum

China Shi Da Education Development Co., Ltd.

Yuliang Su

Wendong Wang

Yongmao Hao

Binfei Li

Lei Li

Binglin Li

Chao Zhang

Qichao Lv

Qi Zhang

Shouya Wu

Dongxia Li

Kaijie Zhang

Bin Yuan

Xiaomei Zhou

Xue Zhang

Zheng Chen

A dual-purpose sacrificial anti-swelling agent, and a preparation method and application thereof are provided and relate to the technical field of oil reservoir exploitation. The dual-purpose sacrificial anti-swelling agent is quaternized lignin, a phenolic hydroxyl group of quaternized lignin is linked with two quaternary ammonium nitrogen atoms that are located at para positions of the same six-membered ring. Raw materials used in the present disclosure are prepared from papermaking waste liquid and a by-product of flue gas desulfurization and denitrification, which not only reduces the cost, but also transforms waste materials into valuable resources. The present disclosure increases the adsorption capacity of quaternized lignin in the formation by quaternizing lignin, and enables quaternized lignin to acts as both a sacrificial agent and an anti-swelling agent through competitive adsorption, achieving multiple purposes by using one agent.

Dual-purpose sacrificial anti-swelling agent, preparation method and application thereof

The last sentence of the abstract has been deleted because it refers to purported merits of the invention. The abstract should not refer to purported merits or speculative applications of the invention and should not compare the invention with the prior art, therefore the abstract has been amended to delete the last sentence by Examiner's amendment.

Method for increasing production and injection of reservoir coupled with flue gas desulfurization and denitrification

An experimental device and method for supercritical CO/HO mixed fluid huff and puff for shale oil development includes a COstorage tank, a water vapor generator, a mixing vessel, and a core holder; the COstorage tank and the water vapor generator are in communication with the mixing vessel; a first pressure gauge and a hygronom are connected to an upper end of the mixing vessel, and a displacement pump is connected to a lower end of the mixing vessel; the mixing vessel is connected to an inlet end of the core holder; the core holder is connected to an inlet end of a drying pipe, and the measuring cylinder is disposed upside down in a liquid containing dish, where the liquid containing dish and the measuring cylinder are filled with a saturated sodium carbonate solution.

Experimental device and method for supercritical CO2/H2O mixed fluid huff and puff for shale oil development

Systems and methods for generating candidate designs and selecting a fracturing position design scheme for a horizontal well to be fractured based on fracturing potential are disclosed. A fracturing potential value of each designed fracturing point or each fracturing point is calculated using obtained values of various indexes of various depth points. A first corresponding relation between fracture conductivity value and the fracturing potential value and a second corresponding relation between a fracture half length and the fracturing potential value is determined. Corresponding first simulated production data for each candidate design is generated, and the candidate design with a highest predicted net present value is selected as the fracturing position design scheme which provides higher rationality and practicability to better guide development.

Fracturing design method and device of a horizontal well to be fractured based on fracturing potential

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Shandong, China

Yuliang Su