Invention Grant
- Patent Title: Method for recovering gas from shale reservoirs and purifying resulting produced water to allow the produced water to be used as drilling or frac water, or discharged to the environment
- Patent Title (中): 从页岩储层中回收气体并净化所产生的水以使生产的水用作钻井或压裂水或排放到环境中的方法
-
Application No.: US12957752Application Date: 2010-12-01
-
Publication No.: US08734650B2Publication Date: 2014-05-27
- Inventor: Robert Bradley
- Applicant: Robert Bradley
- Applicant Address: US PA Moon Township
- Assignee: Veolia Water Solutions & Technologies North America, Inc.
- Current Assignee: Veolia Water Solutions & Technologies North America, Inc.
- Current Assignee Address: US PA Moon Township
- Agency: Coats and Bennett PLLC
- Main IPC: C02F1/44
- IPC: C02F1/44 ; C02F9/00 ; C02F1/24 ; C02F1/28 ; C02F1/40 ; C02F1/66 ; C02F3/12 ; C02F5/08 ; C02F1/20 ; C02F1/26 ; C02F1/52

Abstract:
A system and method for removing gas from a gas producing subterranean formation and removing contaminants from the produced water is provided. The method includes providing a mixture of gas and water gathered from a gas producing well. Thereafter the method entails separating the gas from the mixture to produce a gas product and the produced water which includes organics, suspended solids and dissolved solids including silica. Thereafter, suspended solids are removed from the produced water. After removing some of the suspended solids, the produced water is directed to a micro porous polymer extraction (MPPE) unit. In the MPPE unit aromatic organic compounds are removed from the produced water. Thereafter the produced water is treated in a membrane bioreactor to remove additional organics. Thereafter the produced water is directed to at least one RO unit that produces a high dissolved solids containing reject stream and a low dissolved solids permeate stream. The method or process described reduces the concentration of certain contaminants in the produced water such that the output or permeate stream from at least one RO unit can be used for frac fluid, drilling mud, or discharged to the environment.
Public/Granted literature
Information query