Huanxi heavy oil reservoir is a sand stone formation, with grain pores as the main storage space.

The essential technology of steam drive for heterogeneous heavy oil reservoir with edge-bottom water;

Secondary recovery of high water-cut conventional heavy oil reservoir;

Secondary development of thick block heavy oil reservoirs in Block Gao246;

Research on Some Flow Characteristics during Water Flooding in Viscous Oil Reservoirs and Improving Development Effects;

On Fine Description and Optimal Development of Viscous Oil Reservoirs in Tankou Oilfield;

On Applying Oil in Water Emulsion to Improve Water Flood Effects of Viscous Oil Reservoirs;

Shortages of serious sand producing,being much thinner of up and down separate layer,fault and complex relationship of water and oil in low layer dense oil reservoir of Shengli oilfield are exist that can not carry out exploration reserve and restrain exploitation seriously.

The crude oil in dense oil reservoir of Tahe oilfield is main of heavy oil which density on general is among 0.

Because of the special geological features of the dense oil reservoir of Block Jin 99(xing)in Liaohe oilfield, some problems have strongly needed to get their solution in the current exploitation.

Study on Hydrophobic Polymer's Oil Recovery Rate under High Temperature Heavy Oil Reservoirs;

A lot of heavy oil reservoirs in our country are not producing.

Multicyclic steam stimulation in extra heavy oil reservoirs has been at the mid-late development stage, cyclic times of steam stimulation in oil wells is higher, and eight cycles of steam stimulation are performed in many wells, and even twelve or thirteen cycles are reached in some wells.

Insulation pipe technique for formation test of viscous oil reservoir;

Formation protection techniques are studied in the sensitive viscous oil reservoirs of Wangzhuan Oilfield, the techniques for formation protection during drilling, operation and during steam injection are introduced.

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.