--> Application of Diamondoids for Correlation of Very Mature Oil and Oil-Mixtures
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AAPG ACE 2018

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Application of Diamondoids for Previous HitCorrelationNext Hit of Very Mature Previous HitOilNext Hit and Previous HitOilNext Hit-Mixtures

John M. Moldowan1, Jeremy E. Dahl2, Daniel M. Jarvie3, Donald D. Walker4, Hussain Akbar5, Inessa Yurchenko6


1Biomarker Technologies, Inc., Rohnert Park, CA, United States.
2Laboratory for Materials and Energy Science, Stanford University, Stanford, CA, United States.
3Worldwide Geochemistry,LLC, Houston, TX, United States.
4EP Energy, Houston, TX, United States.
5Kuwait Previous HitOilNext Hit Company, Almadi, Kuwait.
6Department of Geological Sciences, Stanford University, Stanford, CA, United States.


July 23 - 25, 2018 – AAPG ACE 2018,

Posted: July 23-25, 2018

Abstract

While biomarkers have proven to be the standard for Previous HitoilNext Hit-Previous HitoilNext Hit and Previous HitoilNext Hit-Previous HitsourceNext Hit Previous HitrockNext Hit Previous HitcorrelationNext Hit there are limitations. Very mature Previous HitoilNext Hit or condensate generated in the late Previous HitoilNext Hit window/wet gas window often contains insufficient biomarker concentrations to carry out reliable correlations. It is also difficult to accurately assess Previous HitoilNext Hit maturity when biomarkers are absent. Previous HitOilNext Hit produced from unconventional wells is particularly prone to high maturity and diminishing returns from biomarker analysis. In contrast, diamondoids are concentrated more and more with increasing maturity becoming an important resource for both maturity assessment and Previous HitcorrelationNext Hit for highly mature fluids and source rocks. Furthermore, in mixed Previous HitoilNext Hit, while biomarkers might reveal the less mature component, diamondoids will be necessary to determine the more mature one.

We have applied diamondoid maturity assessment by quantitative diamondoid analysis (QDA) and Previous HitoilNext Hit Previous HitcorrelationNext Hit using distributions of large diamondoid molecules (QEDA) and compound specific isotope analysis of diamondoids (CSIA-D) on source rocks and Previous HitoilNext Hit produced conventionally and unconventionally.

Differentiation of fluids produced from the onshore Gulf of Mexico, including the Eagle Ford, Glen Rose, Bossier, Haynesville and Pearsall Formations, as well as some mixtures, have been determined. All these Previous HitoilNext Hit samples were without biomarkers and extremely mature, but source differentiation was clearly determined by diamondoids. Very mature source rocks from the Eagle Ford Formation were also analyzed by QEDA and CSIA-D showing facies differentiation in the well core. Various levels in the core were shown to contribute to Previous HitoilNext Hit being produced from local unconventional wells drilled laterally through the Eagle Ford. In the Permian Basin, mixtures of very mature Previous HitoilNext Hit from the Ellenburger (Ordovician), Woodford (Devonian) and Pennsylvanian sources were de-convolved and allocated by using QEDA.

Previous HitOilNext Hit-to-Previous HitoilNext Hit and/or Previous HitoilNext Hit-to-Previous HitsourceNext Hit Previous HitrockNext Hit correlations have been established by using QEDA and CSIA-D with samples from unconvertional plays throughout Texas, Niobrara source rocks and oils, Permian Basin produced oils and Previous HitoilNext Hit mixtures, Alaska’s north slope, the Williston Basin, the Mexican Gulf of Mexico, Nova Scotia - Canada, Kuwait, and offshore Brazil. Extracts from over-mature source rocks with estimated vitrinite reflectance as high as 3.0 % Ro have been fingerprinted for Previous HitcorrelationTop with fluids by the QEDA methods.

AAPG Datapages/Search and Discovery Article #90323 ©2018 AAPG Annual Convention and Exhibition, Salt Lake City, Utah, May 20-23, 2018