Chapter 1 - Conventional Reservoir Geochemistry

01-00 - Introduction (5 min.) Sample Lesson
01-01 - Reservoir Geochemistry And Models Of Reservoir Filling (28 min.) Quiz: 01-01 - Reservoir Geochemistry And Models Of Reservoir Filling
01-02a - Compositional Variations, Filling History and Compositional Grading (22 min.)
01-02b - Petroleum Biodegradation, Water Washing, Phase Separation (25 min.)
01-02c - Tar Mats, Fluid Properties From Geochemistry, Lesson Recap (25 min.) Quiz: 01-02c - Tar Mats, Fluid Properties From Geochemistry, Lesson Recap
01-03 - Reservoir Compartmentalization Geochemical Examples (14 min.) Quiz: 01-03 - Reservoir Compartmentalization Geochemical Examples
01-04a - Reservoir Compartmentalisation Application & Mixing Timescales (34 min.)
01-04b - Summary Of Lessons 01-01 to 01-04 (10 min.) Quiz: 01-04b - Summary Of Lessons 01-01 to 01-04
01-05 - Introduction to Production Allocation in Conventional Reservoirs (16 min.) Quiz: 01-05 - Introduction to Production Allocation in Conventional Reservoirs
01-06 - The Mathematics Underpinning Allocation & the APT Allomon™ Solver (21 min.) Quiz: 01-06 - The Mathematics Underpinning Allocation & the APT Allomon™ Solver
01-07 - Examples of Deployment of Allocation Programs in Conventional Settings (13 min.) Quiz: 01-07 - Examples of Deployment of Allocation Programs in Conventional Settings
01-08 - A Production Allocation Case Study from the North Sea (22 min.) Quiz: 01-08 - A Production Allocation Case Study from the North Sea
01-09 - Allocation Workflows Using Gas (16 min.) Quiz: 01-09 - Allocation Workflows Using Gas

Conventional Reservoir Geochemistry / Chapter 1 - Conventional Reservoir Geochemistry

Lesson 01-00 - Introduction

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Transcript

01. Lesson 1.00: Introduction 02. Introduction to (Conventional) Reservoir Geochemistry 03. Learning Objectives 04. Lessons Outline

01. Lesson 1.00: Introduction

Hi, my name is Julian Moore. I'm a geoscientist of APT. And today, I'll be giving a course on an Introduction to Reservoir Geochemistry. I'd like to acknowledge Richard Patience, who's an associate consultant of APT who designed much of the material. And also my co-presenter for the material, Craig Barrie.

02. Introduction to (Conventional) Reservoir Geochemistry

So an introduction to conventional reservoir geochemistry. So we're going to be only really talking about geochemistry as applied to conventional reservoir systems. We've got lots of material with respect to unconventional reservoir systems, and my colleagues Eric and Craig will be presenting that in another course.
So reservoir geochemistry, when deployed early enough in field life, can be used to identify and understand a wide range of issues that can affect petroleum reservoirs and then help us optimize our exploitation and development of those resources. Usually, the primary goal is to optimize the petroleum recovery of the asset. And we do this by understanding the distribution offluid types, the nature of those fluids, how they vary, the processes that are controlling those variations. So the course today is to provide an awareness of these tools that we have in the geochemical toolkit and an understanding of how geochemists and our geoscientific colleagues, our engineering colleagues can use these tools across the E&P cycle. So fundamentally, we're trying to give you an introduction to the discipline of reservoir geochemistry. That said, as with most geosciences, I'm always enhanced by integration and multidisciplinary approaches. So that's something we will emphasize through the course. But obviously, most of the material is focused on the geochemical aspects of those, what we would advocate to be multidisciplinary studies.

03. Learning Objectives

So the learning objectives is to provide an awareness of what geochemistry can do for you in a development context. We're going to describe the different models that have been published on how reservoirs fill because we need to use that as a framework to then understand compositional variations, which we may then use to decipher aspects of the charge history and how the fluids are varying around within the trap so we can then make interpretations with respect to things like compartmentalization, fluid property prediction, etc.. So what we'll talk about is how the oil is got to the trap. And then once it's in the trap we'll describe a range of processes that can alter the petroleum composition. And we'll also provide an awareness of a series of published examples of reservoir geochemistry studies. Towards the end, we'll talk about timescales, particularly timescales of mixing within reservoirs. This is something that's not always been considered in all the published studies, but it's an important aspect of the analysis that we think people should think about. And then lastly, my colleague Craig will give you an introduction to production allocation using geochemical methods, again in conventional reservoir settings.
In terms of the professional development tags, the topics that we'll be discussing here will have applications broadly across any reservoir geoscience, reservoir geochemistry of course, which is the focus of the talk, reservoir description, appraisal, and field development planning.

04. Lessons Outline

So we have 5 lessons in the course today. The first lesson is just an introductory chapter to make some definitions around what reservoir geochemistry is. And we'll introduce these mixing models, the reservoir charging models that have been published and we'll discuss those and look at a test of one of the models that have been published.
In Lesson 2, go look at the compositional variation in reservoirs and the processes that are driving those changes.
In Lesson 3, we'll look at some published real-world examples of case studies, essentially where reservoir geochemistry data has been used to make inferences about reservoir continuity.
And then in Lesson 4, we'll look at the time scale of some of the mixing processes. Is it a difference that you observe actually carrying information about continuity or is it just telling you that there's a process within the reservoir that's ongoing?
And then finally, in Lesson 5, my colleague Craig Barrie will give an introduction into production allocation using reservoir geochemistry.