Study Of Sand Flow Mechanism And Its Harness In Wenzhong Oil Field

Zhongyuan oil field has entered the middle and later periods of exploitation.Because of the effect of the fracturing reformation and unreasonable drawdown pressure,rock frame has been destroyed seriously,and the situation of sand flow has become more and more seriously.It has affected the well yield,increased the maintenance cost,destroyed the course of production and overall mining quality.To 2010,zhongyuan oil field has 909 sandy wells,and it indicates there appears more and more sandy wells,wider sand flow areas,deeper sand producing formation and worse hole condition.Although all oil production plants has taken effective steps to control the sand flow,it also has great difficulties to do the job of sand control in the conditon of lacking of technique,various hole conditions,and so on.It has brought great loss to zhongyuan oil field.To solve the problem,we analyze and conclude the sand law and its effect factors of Wenzhong oil field based on the extensive survey and study bonding with field data and lab study.Moreover,we proposed the sand control measures.Wenzhong oil field frequently has the sand flow.Its interior reason is that it contains high-load clay mineral,and its exterior reason is the water sensitivity caused by the flood development and ascending water content in oil well as well as the speed sensitivity caused by the high drawdown pressure.We improve the technique of chemical sand control and use the method of multiparameter decision making package.To carry out the sand flow prevention and sand flow control by the logos of steady,resist,discharge,concretion,we acquires good sand control results.We decrease the sand flow effectively and supply the technological borrowing for other oil fields.