委内瑞拉奥里诺科重油带油藏特征及开发潜力

Reservoir characterization and exploitation potential in Orinoco heavy oil belt in Venezuela

侯君 戴国汗 危杰 肖毅 徐学品

Hou Jun Dai Guohan Wei Jie Xiao Yi Xu Xuepin

中国石化集团 国际石油勘探开发有限公司, 北京 100083

SINOPEC International Petroleum Exploration and Production Corporation, Beijing 100083, China

奥里诺科重油带位于东委内瑞拉盆地南部斜坡带,总面积55 000 km2。重油带油藏埋深350~1 200 m,储层主要为渐新统和中新统未固结砂岩,平均孔隙度33.4%,平均渗透率4 760×10-3μm2;油层温度40~55 ℃;油藏压力为常压;超重油重度为7.5°~9° API,原地黏度介于1 000~6 000 cp;油藏有效厚度为6~120 m左右;探明原始地质储量11 220×108 bbl,可采储量2 600×108 bbl。重油带共有5个开发区块,日产油量约72×104 bbl,已形成一套经济可行的开发技术系列。重油带开发区块动用的可采储量仅占重油带可采储量的3%左右,尚具有巨大的勘探开发潜力。

The Orinoco heavy oil belt is on the southern slope of the Eastern Venezuela Basin, with an area of 55 000 km2. The heavy oil reservoirs were buried 350-1 200 m deep. The unconsolidated sandstones in Oligocene and Miocene worked as the main reservoirs, with the average porosity and permeability of 33.4% and 4 760×10-3 μm2, respectively. Reservoir temperature is 40-55 ℃. Reservoir pressure coefficient is about 1. Super heavy oil API is 7.5 °-9 °. Situ viscosity is 1 000- 6 000 cP. Reservoir effective thickness is 6-120 m. The original proven geologic reserve is 11 220×108 bbl, and the recoverable reserve is 2 600×108 bbl. There are five heavy oil developing blocks with daily oil production of about 72 ×104 bbl. A set of economic and feasible developing technology series has been formed. The recoverable reserve of the developing blocks is about 3% of the total recoverable reserves of heavy oil belt, showing great exploration potentials.

中国石油化工集团委托项目"南美重点盆地油气分布规律及勘探选区研究"(JP08014)资助。

https://doi.org/10.11781/sysydz201406725