The Study Of Water Management During Shale Gas Exploration

The exploration of shale gas depends heavily on large amount of water input,while generates lots of wastewater output.Whether from the prospect of environment or the prospect of economic,the water management has become the key problem in the exploration progress of shale gas.The article focusses on the key water consuming parts of the exploration of shale gas – hydraulic fracturing progress,and build a double objective inexact programming model considering the uncertainties of the water volume needed for each well hydraulic fracturing progress and the uncertainties of the flowback water volume as well as produced water volume from the perspective of two divided period of the whole shale gas water management cycle.The objective of the proposed model is to try to find the trade off between economic objective(economic cost)and the environment objective(the total volume of fresh water needed during the hydraulic fracturing progress)under given uncertain level.An application to water management of china shale gas exploration is presented to demonstrate effectiveness of the model with the help of historical wellpad data input and the realization of programming software.The article finds that(a)Less system cost can be reach as the decision maker choose less uncertain constrain satisfy degree can lead to less economic cost and less environment cost.(b)The exact value of economic cost and environment cost can be different in the eyes of different cost-preferred decision maker'.(c)At current treatment technology level,the best reuse strategy of the early flowback stage is to reuse the flowback water directly,while the reuse strategy of the produced stage is constrained by the water treatment technology level.