ABSTRACTS Vol. 23 No. 3 Jun. 2009

Yang Yang, Dang Ruirong and Ren Zhiping. Research on transient electromagnetic method in borehole. PI, 2009,23（3） .1 - 3,7
The fundamental theory of transient electromagnetic method in borehole is researched. The distribution characteristics of transient electromagnetic field in borehole, calculation procedure of apparent conductivity and the method of time-depth conversation are expounded, and loop configuration in the borehole is introduced. These provide theoretical basis for further studying transient electromagnetic systems in borehole.     

ABSTRACTS Vol. 27 No. 4 July 2013

Ol Characteristics of hydrocarbon pathway systems and their controls over hydrocarbon accumulation in the Mahai--Nanb- axian area Zhai Xiaofeng et al （College of Geological Science and Engineering, Shandong Universily of Science and Technolo- gy, Qingdao, Shandong 266590）     

ABSTRACTS Vol. 27 No. 2 Mar. 2013

01 Deformational characteristics and its segnificance on hydro- carbon reservoir--forming of Fuyu reservoir in the middle of Daqing Placanticline Ying Wenfeng et al（College of Earth Sciences, Chengdu University of Technology, Chengdu,Siehuan 610059） By the analysis of seismic data interpretation of Fuyu reservoir in Daqing Placanticline, the palaeotectonic maps of different times have been compiled. From the study of defor- mational characteristics of Fuyu reservoir,     

ABSTRACTS Vol. 27 No. 5 Oct. 2013

Zhang Han, Chen Bao, Wang Wei, Wu Xiangping, Cheng Gang and Yang Jing. FPGA based high speed acquisition and processing module for logging depth signals. PI, 2013,27 （5）： 1-4 Depth information is a very important data during the whole progress of well logging. This paper presents a kind of method for acquisition and processing the depth information by using FPGA platform. Firstly, we have designed an isolation circuit, besides, with the help of Cyclone series FPGA produced by Altera, we processed the depth pulse outside the chip and provided depth interrupt with the moving direction during the logging progress, which can be pro- cessed by an external DSP processor. After we designed the logic inside the FPGA, we use SignalTap II logic analyzer embedded in the Quartus II software to test our design. The results show that： the integrated high-speed depth signal acquisition and processing module not only has a high sampling speed and measuring accuracy, but also, under the pro- tection of the state machine, it has the ability to screen and judge errors. It improves the reliability of the system and meets the design requirements of the depth measurement system.     

ABSTRACTS Vol. 28 No. 2, Mar. 2014

Yuan Wei et al（Earth Science, and Engineering College, Xi ′an Petroleum University, Xi＇an, Shaanxi 710065） In Baihe area of Ordos basin. Yan＇an formation is characterized by gentle stratum, undeveloped structure, small reservoir distribution range and high yield. Aiming at the characteristics, the research on early- middle Jurassic sedimentary facies and its relationship with the hydrocarbon migration and accumulation has been carried out.