Reason Analysis on the Variation of Reservoir Thickness Interpretation of Different Logging Series in Sanan Development Zone

In the oilfield development process, for the geological problems, the new logging apparatus has been developed and the logging series are constantly changing. Comparing the thickness interpretation of different logging series, this paper has analyzed the variation reasons of the thickness and the effect factors of thickness interpretation such as well logging series, mud properties, formation pressure, formation fluid properties and well spacing density. This provides a more reliable parameter for calculating oil geological reserves accurately and improving reservoir evaluation.Key words: Logging series; Reservoir; Thickness division; Effective thicknes

Technology and effect of small well spacing control decline in close well network

In order to further improve oil recovery, water flooding was adjusted for three times from 2009 to 2012. The spacing of injection-production Wells was shortened from 250 meters to 106 meters, and the density of well pattern increased from 90.7 to 196 per square kilometer. This leads to the problems of “rapid rise of water cut, large difference in oil formation production, and large production decline in block u”. In recent years, we by fine geologic research, to improve the poor thin oil layer use condition, controlling water cut rising velocity, as the key point, the energy recovery network continuously grope for dense well spacing control regulation technology, gradually formed dense well network from decreasing “three-excellent” control technology, through the effective implementation, improved the block development effect, achieve the goal of stabilizing oil water control

STUDIJA UNUTARLEŽIŠNE ARHITEKTURE TE PREOSTALE NAFTE NA PRIMJERU ISTOČNOGA DIJELA STRUKTURE OKRUGA SABEI II

In the Daqing oilfield, Heilongjiang Province, China, in the eastern part of the Sabei II District is a fi ne potential-tapping demonstration area with a long development time and complex history of well conditions. As oil exploration has entered into the high-water cut stage, the fi ne description of reservoir structure had a great significance to improve the effect of oil exploration. An abandoned channel is an important basis for recognizing a single river border and point bar. The top sand-shale interbedded or muddy sediments have a shelter action for the reservoir fluid, so correctly recognizing the abandoned channel is an important scientific basis for further analysing reservoir architecture and exploring the remaining oil. Due to the lateral shelter action of sand-shale interbedded with muddy sediments, the semi-connected body, consisting of abandoned and normal channel sand body, leads to an injection and production imbalance, which is namely production without injection or injection without production. It makes the top of the channel sand body become the favourable gathering place for remaining oil and a further main exploring object.Polje Daqing, u provinciji Heilong, Kina, smješteno je u istočnome dijelu okruga Sabei II. To je prostor s velikim potencijalom, ali i dugom poviješću bušenja i razradbe ležišta ugljikovodika. Kada je proizvodnja nafte došla u razdoblje pridobivanja s velikim količinama vode, pojavila se potreba za ponovnom analizom strukture ležišta, a kako bi se povećao udjel nafte u fluidu. Težište je stavljeno na napuštene paleokanale, odnosno riječna korita i sprudove. U krovini se nalaze taložine šejla ili glinjaka koji su ujedno izolatori, dok su ležišta u napuštenim kanalima predstavljena izmjenama pješčenjaka i šejla. Takva izmjena može predstavljati i bočne granice migracije, ali i tek djelomice povezana ležišna tijela ispunjena pješčenjakom podrijetlom iz napuštenih ili glavnoga riječnoga paleokanala. To utječe i na utiskivanje te planiranje proizvodnje, a zbog održavanja proizvodnje bez dodatnoga utiskivanja ili utiskivanja bez odraza u proizvodnji. Zaključeno je kako je najplići kanalski pješčenjak najpovoljnije ležišno tijelo za pridobivanje preostalih količina nafte te uopće za daljnju razradbu