WESTERN SIBERIA: EXPERIENCE, ORGANIZATION AND RESULTS OF PRODUCTION LOGGING APPLICATION FOR OIL FIELDS DEVELOPMENT

摘要

Oil production in the main Russian oil area - Western Siberia - started in 1964 and developed very intensivly. In some years oil production increased up to 36 mln t. In 1983 production mounted to 1 mln t per day, in 1988 year it achieved the maximum level of 394 mln t. Total amount of running producing wells mounted to 55 thousand wells, injection ones - to 19 thousand wells in 1991. Almost in all cases pressure maintance while oil field development (at present 152 field are in production) are carried out by water injection - with fresh, formation water and their mixture -at different water drive regimes. It is natural that water cut increased quickly, and recently it is more than 80%. After 6-7 years of development intensive pumping was applied (ESP and rod pumps, sometimes -gaslift), now pumping wells makes 95% of total production. At present accumulative production for the area is 6.5 bin t, from 1989 production began to fall down and daily rates are defined not only by the age of oil province but baisclly by general economical situation in Russia. In Siberia the begining of resourses development in oil industry coincided in time with the gain of interest to logging information about dynamic processes during oil field development. It should be mentioned that in the former Soviet Union the degree of investigation of geological section after drilling by well logging was relatively high, it was quite reliable to build a geological model, as to methodics - they were at the level of world standards. However there was no experience in systematic and investigation of running producing and injection wells with the aim of production monitoring. Though the limited set of tools existed consisting of a sertain number of tools - spinner and Termoconduction Flowmeter, Water cut logging tool, Density, Well Resitivity and the first model of Neutron tool. There was no experience both in analyzing of individual log data and in complex processing for different geological and reservoir development tasks.