Study on well and layer selection for refracturing in Ansai Oilfield;

The correlative research of well and layer selection in refracturing in the past is mostly to establish a model based on BP neural network.

Shallow profile modification technique is used in Gaotaizi reservoirs in western Nan 1 area through detailed well and layer selection and aiming to the water injection wells with large interlayer difference and rapid water cut increase in the oil production wells connected with them.

On the basis of the data of fracturing wells in Zhongyuan Oilfield over the years,a set of artificial intelligence system suitable for selection of well and layer for fracturing is developed.

The method of selecting well for increasing production measure gives priority to well testing whose basic model is built by combing reservoir engineering method and comprehensively taking into account of very factors of determining measure effect.

Study of well selection and zone selection for re-fracturing;

According to well selection rules,10 oil wells of oil viscosity >15 mPa·s,wax content >20%,net pay thickness 2.

Based on these,three well selection principles on zonal gas production in Sebei gas field were put forward as follows: a.