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The volumetric potential assessment of the oil shales of Tremembé Formation, Taubaté Basin, Brazil
Journal of Petroleum Exploration and Production Technology ( IF 2.4 ) Pub Date : 2020-02-24 , DOI: 10.1007/s13202-020-00846-z
Fernanda Setta , Sérgio Bergamaschi , René Rodrigues , Cleveland Jones , Hernani Chaves , Marco Brito , Egberto Pereira

This assessment of the volumetric potential of the oil shales of Tremembé Formation (Oligocene, Taubaté Basin, Brazil) was based on the sedimentological study of 2457 total organic carbon and 1007 Rock–Eval pyrolysis analyses of core samples from nine survey wells drilled in the central portion of Taubaté Basin. Along a 240-m-thick package in the upper part of Tremembé Formation, thirteen chemostratigraphic units with thicknesses varying from 10 to 35 m were identified. The upper interval (unit L), 30 m thick, exhibited the highest organic content and original generation potential and was thus studied in detail. In unit L, oil yield maps were constructed, seeking to identify the most attractive areas for industrially exploiting the oil shales, and volumetric calculations employing a probabilistic Monte Carlo method were conducted to quantify the potentially recoverable oil volume. Three exploratory scenarios based on yield values (S1 + S2) were considered for calculating the oil volumes, seeking to offer different exploratory scenarios for decision making. For the scenario that considered only average yields above 100 mg HC/g rock, the recoverable oil volume is 525 million bbl (P90) to 884 million bbl (P10); for the scenario that considered only average yields above 80 mg HC/g rock, the recoverable oil volume is 1.4 billion bbl (P90) to 2.6 billion bbl (P10); and for the scenario that considered only average yields above 60 mg HC/g rock, the recoverable oil volume is 3.6 billion bbl (P90) to 5.4 billion bbl (P10).

中文翻译:

巴西Taubaté盆地Tremembé组油页岩的体积潜力评估

Tremembé组(渐新世,巴西Taubaté盆地,巴西)油页岩的体积潜力评估基于对2457总有机碳和1007 Rock-Eval热解分析的岩心分析,这些分析来自在中部钻探的9口测井的岩心样品陶巴特盆地的一部分。沿着特雷梅贝组上部240米厚的包裹,确定了13个化学地层单元,厚度从10到35 m不等。30 m厚的上部层段(L单元)显示出最高的有机含量和原始生成潜力,因此进行了详细研究。在L单元中,绘制了石油产量图,以寻找最有吸引力的工业开采油页岩的地区,并使用概率蒙特卡罗方法进行体积计算,以量化潜在可采油量。考虑了基于产量值(S1 + S2)的三种探索方案来计算油量,力图为决策提供不同的探索方案。对于仅考虑平均产量高于100 mg HC / g岩石的情况,可采油量为5.25亿桶(P90)至8.84亿桶(P10);对于仅考虑平均产量高于80 mg HC / g岩石的情况,可采油量为14亿桶(P90)至26亿桶(P10);对于仅考虑高于60 mg HC / g岩石的平均产量的情况,可采油量为36亿桶(P90)至54亿桶(P10)。考虑了基于产量值(S1 + S2)的三种探索方案来计算油量,力图为决策提供不同的探索方案。对于仅考虑平均产量高于100 mg HC / g岩石的情况,可采油量为5.25亿桶(P90)至8.84亿桶(P10);对于仅考虑平均产量高于80 mg HC / g岩石的情况,可采油量为14亿桶(P90)至26亿桶(P10);对于仅考虑高于60 mg HC / g岩石的平均产量的情况,可采油量为36亿桶(P90)至54亿桶(P10)。考虑了基于产量值(S1 + S2)的三种探索方案来计算油量,力图为决策提供不同的探索方案。对于仅考虑平均产量高于100 mg HC / g岩石的情况,可采油量为5.25亿桶(P90)至8.84亿桶(P10);对于仅考虑平均产量高于80 mg HC / g岩石的情况,可采油量为14亿桶(P90)至26亿桶(P10);对于仅考虑高于60 mg HC / g岩石的平均产量的情况,可采油量为36亿桶(P90)至54亿桶(P10)。对于仅考虑平均产量高于100 mg HC / g岩石的情况,可采油量为5.25亿桶(P90)至8.84亿桶(P10);对于仅考虑平均产量高于80 mg HC / g岩石的情况,可采油量为14亿桶(P90)至26亿桶(P10);对于仅考虑高于60 mg HC / g岩石的平均产量的情况,可采油量为36亿桶(P90)至54亿桶(P10)。对于仅考虑平均产量高于100 mg HC / g岩石的情况,可采油量为5.25亿桶(P90)至8.84亿桶(P10);对于仅考虑平均产量高于80 mg HC / g岩石的情况,可采油量为14亿桶(P90)至26亿桶(P10);对于仅考虑高于60 mg HC / g岩石的平均产量的情况,可采油量为36亿桶(P90)至54亿桶(P10)。
更新日期:2020-02-24
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