Study Of Recognition And Explanation Method To Abnormally High Pressure Layer

The reservoir thickness is the significant parameter of the oil-field fine geologic research, geologic reserve computation and the oil-field development. Its accuracy not only affects the reliability of reserve computation directly, but also interfere with the fine geological work and the understanding of reservoir sand body growth degree and the distribution mode, while the abnormally high pressure layer recognition and explanation is also the urgent question to be resolved in thickness division, whether it is reasonable or not directly relates the precisions of following work for example matching ,waterflooding and so on, and also relates the scheme establishment. At present, we only can assess the abnormally high pressure layer qualitatively, but haven't the quantification standard, so it causes the phenomenon of missing or overplusing delimitation in the actual thickness explanation.This project applies massive well log information mainly to understand the relations between the distribution condition of abnormally high pressure layer and the casing damage. We select the electrical parameter reasonably according to the special curve characteristic which the abnormally high pressure layer displays. We establish chart and formulate quantitative standard to divide abnormally high pressure layer according to the massive actual material. Then we applicate every curve's synthetical decision method of the well,offset well comparison method, the well's upper and lower layer comparison method, combinate well curve and fine geologic success ,to further divide abnormally high pressure layer ,and applicate both dynamic and static method to verify recognized abnormally high pressure layer ,to supply reference for divisions of following new wells'abnormally high pressure layer.Through this research, we may improve the division accuracy of the abnormally high pressure layer greatly, supply reliable reference for the following scheme establishment, and adjust comprehensive administer mearsure just in time , thus achieve the goal of reducing casing damage.