Research On Evaluation Technology Of Horizontal Well Logging Interpretation

Since the application of horizontal well technology,with its stable yield,high return on investment advantages,quickly swept the oil drilling industry,The technology of horizontal well in China started late,but developed rapidly.At present,the major oil fields in China have accelerated the application of horizontal well technology,Compared with the foreign logging companies,the domestic logging companies are still relatively backward in the instrument and equipment,At present,it is mainly explained by the horizontal well interpretation model and method.The interpretation method with the characteristics of horizontal well is still in the stage of exploration and initial application.It has not yet formed a systematic and integrated horizontal well interpretation and evaluation technology,The advantages of logging in fine evaluation of porosity,permeability and saturation have not been reflected?Especially logging curve of the environmental correction in the horizontal well has not yet formed a practical,large-scale promotion and application also faces many problems;Horizontal well trajectory of the fine description,but also with foreign companies there is a big gap;horizontal well fluid identification and reservoir optimization need to further increase scientific research.This paper focus on the development of horizontal well block in Ordos basin as the starting point,First,from the perspective of geology and reservoir,the horizontal well trajectory characteristics of different reservoir types in the study area are analyzed,On this basis,the characteristics of horizontal well logging in the study area are analyzed,The response characteristics of the horizontal wells in different fluid types reservoirs are summarized and summarized according to the different characteristics of the response curves between the guide wells and the horizontal wells under different angle conditions(Chapter 3);Secondly,an anisotropic correction method suitable for the region was established by different methods such as petrophysical experiment and actual data method(Chapter 4);At the same time,based on the geological knowledge and the logging curve,the fine modeling technology of horizontal well sanding is put forward,and the three-dimensional characteristics of horizontal well trajectory can be clearly reflected by fine processing of man-machine interaction.(Chapter 5);Based on the petrophysical experiments and the regional interpretation model,a quantitative interpretation model of porosity and permeability in the study area was established.Based on the quantitative interpretation of the model,a horizontal well fluid property identification technique was formed(Chapter 5);In the end,a set of horizontal well logging training and evaluation techniques for the unconventional tight sandstone reservoirs in the Ordos basin has been established,which effectively supports the horizontal interpretation of the horizontal wells in the region and promotes the increase in the Sulige region.