Influencing factors and correction method for error of fluid saturation calculation during sealed coring;

First application of sealed coring technique in Bohai Oilfield

Based on the sealed coring, and combined with logging interpretation and numerical simulation, the water flooded characteristics of oil layer, and remaining oil distribution can be studied, the inherent relation of water flooded characteristic and interlayer, internal and plane heterogeneous characteristic, water flooded characteristic and fluid can be revealed.

Effect of degassing in sealing core drilling on the water saturation of cores;

In order to check the formation water flooded degree and distribution of remaining oil of various Putaohua reservoir under the current well network condition, a confined coring well-examination is deployed.

In order to check the formation water flooded degree and distribution of remaining oil of various Putaohua reservoirs under the current well network condition, the authors deployed a confined coring well-examination.

Based on core,oil test and logging data,and replacing the conventional sampling with close sampling,the non-matching problem between the bulk samples and the small samples has been solved.

The authors invented a new style of sealed digestion bomb that can be used for the decomposition of analytical samples.