Through studying the ratio of reservoir and formation for a single well, the frequency distribution of reservoir thickness, production capacity situation and pool-forming regularity, Xudong area can be divided into three reservoir development zone, so we will find out the most favorable reservoir development zone, then it can play a guiding role for the next step of the exploration deployment.

From the point of view of sedimentology,the type,quality evaluation,genesis and development model of hydrocarbon source rocks in the study area were analysed according to the statistics of parameters TOC(%),S1+S2 and bitumen "A".

It links geological dynamic analysis and geophysical static escription, and figures out the problem of play choice, trap identificationand description according to formation mechanism, development model and inner composition of fault-controlled lake basins.

Objective:to construct subtracted cDNA library of rat molar root development genes related to pattern formation using modified substractive hybridization(MSH).

The developed pattern,characteristic,controlling factor and identification marks of the various stages of palaeokarst are studied.

The Ordovician palaeo-karst had gone through 3 evolution stages and there are 7 types of developed patterns in the Huanghua Depression.