Study on reservoir protection technology during water injection of low permeability oilfield;

According to the formation properties of Jidong oilfield and for the purpose of environmental and reservoir protection,a suitable high-inhibited and dual-protection drilling fluid system with non-clay phase has been developed.

Coal seam as the CBM source and reservoir has different features with conventional oil and gas reservoir on reservoir characteristics and storage manners that have determined specialty of CBM well drilling,completion,reservoir protection,hydraulic fracturing and other techniques.

A Research on Related Technologies of Formation Damage Control for Deep Gas Well in Xujiaweizi;

According to the features of non - conventional wells in Zhongyuan oilfield , the paper discusses the research of formation damage control technology in complex geologic condition.

In allusion to the characteristics of reservoirs in the area, techniques for formation protection were studied.

A polymine drilling-in fluid system is developed for use in Jidong oil field according to the reservoir parameters and with the requirements of environment and formation protection taken into consideration.

In consideration of the characteristics of multi-laminar sand-shale thin reservoirs and interbedded viscous oil reservoirs, the characteristics of reservoir changes are studied under the thermal and non-thermal production conditions, fluids used in well drilling and well completion, the formation protection by oil production technique are also studied.