Michael Best and Friedrich LLP
Chelating agent for reservoir acidification and stimulating injection and its preparation method and application
A chelating agent may be used for reservoir acidification and stimulating injection. The raw material composition of the chelating agent comprises: 10.0%-20.0% of methanesulfonic acid, 10.0%-20.0% of methanol, 10.0%-20.0% of polyaspartic acid, 10.0%-15.0% of epoxy succinic acid, 5.0%-10.0% of sodium cetyl sulfonate, 10.0%-15.0% of cetyltrimethylammonium bromide and the balance of water. The present disclosure also provides a preparation method of the above chelating agent. The chelating agent for reservoir acidification and stimulating injection may be used in an acidizing and stimulating injection process, wherein it can effectively dissolve rock cracks, be used directly without need to be reversed.
PetroChina Company Limited
E C C
E21B C09K C09K
inventional inventional inventional
Erzhen Xianwen Zhiying Xiaobing Hongjun Yong Lei Zhenning Lijun Suiwang Zhaojie Bin
Wang Li Deng Lu Lu Wang SUi Ji Mu Zhang Song Yao