Reservoir Understanding and Prediction across sequences in Evaporite Geosystems

THE FIELD WORKSHOP

Join your trip experts, Dr. John Warren and Dr. Ian Dyson, on this 12 day field workshop and experience first hand the diversity and economic significance of saline systems and sequence analysis in Australia’s evaporite geosystems (modern and ancient). This 12-day combined field and lecture course captures the diversity and geological importance of textures in saline depositional systems across the world famous regions of the Coorong, Marion Lake, Lake Eyre, and the Flinders Ranges, as well as core-based study of facies textures, distribution and architecture. These field workshops are suitable for 10-15 participants.

 

OBJECTIVES

• Understand the depositional and diagenetic significance of evaporite, limestone and dolomite textures across all scales (from core to reservoir)

• Learn to interpret mega-evaporite geometries in terms of tectonic and eustatic controls

• Better appreciate implications of saline stacking and halokinetic patterns in terms of reservoir and non-reservoir distribution, their architecture, the heterogeneity and quality of reservoir in an evaporite sequence framework.

• Integrate different scales of observation and interpretation from outcrop, to core, to wireline, to seismic scale.

• Development-  and production-scale modeling of facies distribution, stacking patterns, bed-scale stratigraphy, and the hierarchy of architectural elements within distributive saline depositional, halokinetic and diagenetic systems.

 

LECTURE MODULES

Evaporite textures in a depositional and diagenetic framework

Brine hydrology and geochemistry drive diagenesis

Ancient evaporites - why only partial Quaternary analogs

Halotectonics, welds and poroperm prediction

Oil and gas accumulations in evaporite-entraining basins

 

FIELD SITES

Modern lacustrine Coorong carbonates.

Modern salina tepees, stromatolites and bedded subaqueous sulphates of Marion Lake region.

World-class salt pans and bajadas of Lake Eyre and Lake  Torrens

Ancient halotectonic  geosystems of the Flinders Ranges

Salt cores from a variety of Silurian, Cambrian and Neoproterozoic evaporites

 

 

 

SUGGESTED ITINERARY (daily breakdown)

Day 0 Arrival in Adelaide

Check-in at Rydges-South Park, located at the corner of West and South Tce Adelaide

 

Day 1 In-house lectures

Introduction to Evaporites; Textures and hydrological associations

 

Day 2 Field visit to Coorong Lakes in Salt Creek region (SE of Adelaide)

Hydrologies and mineralogies in modern and ancient estuary/ barrier bar; lake geochemistry; Milne Lake; Pellet lake, protodolomite, yoghurt mud textures; tepees and capillary evaporation

 

Day 3 In-house lectures

Subaqueous and sabkha hydrologies and textures, stromatolites, tepees, cements and overprints as basin scale drawdown vs capillary recharge indicators

 

Day 4 Field visit to Marion Lake, Stenhouse Bay region, Yorke Peninsula

Marine geosystem models and sequence understanding over deep time in a plate tectonic framework

 

Day 5  (am lecture) (pm core library)

(am lecture) Officer Basin Geology; continental lacustrine (trona/shortite) versus sulphate and halite sabkha/pan

(pm core library) Cambrian lacustrine and marine sabkha/saltern core from the Officer Basin will be studied

 

Day 6 Depart Adelaide and drive to Leigh Creek

All day travel with evening arrival and check into accommodation at Leigh Creek Hotel

 

Day 7 Flyover ex Leigh Creek Airport: Lake Eyre, Lake Torrens, Peake & Denison Ranges

Lake Eyre; Salt basins, Warburton Channel; Neales River Delta, Dunes (sulphate versus quartose sands), Estuarine sabkha (tidal signatures in a continental basin)

Peake & Denison Ranges: Dead Sea analog, Red Sea Miocene analog, pre-rift geometries

 

Day 8 In-house lecture

Salt tectonics, Longterm salt cycling, Regional (seismic scale) halokinetic reservoir predictors

 

Day 9 Beltana Diapir

Salt withdrawal mini-basins, Allochthonous salt tongues; Salt welds; subsalt reservoirs

 

Day 10 Beltana Diapir and Patsy Springs Canyon

Salt-sediment interaction suprasalt; Shallow marine facies; Deep-water cyclicity

 

Day 11 Depart Leigh Creek

Drive to Adelaide (all day drive) with overnight at Rydges

 

Day 12 Depart Adelaide

 

 

 

COURSE MATERIALS AND LOGISTICS

All participants will receive a digital copy of all course materials including a copy of Dr. Warren’ latest (2016) book on evaporites. In addition, hard copies of field course notes will be provided.

 

Accommodation and Meals (based on Single room per participant)

Days 0-5 and Day 11;  Stay at Rydges South Park, downtown Adelaide, located at corner of West and South Tce (7 nights). Days 6-10; Stay at Leigh Creek Hotel (5 nights)

Days 1-11; All meals and coffee breaks are catered and included in per participant costing

 

Flyover on Day 7, the cost is included in per participant costing

 

COURSE DURATION

The course begins and ends at Rydges Hotel-South Park, Adelaide. All participants are responsible for their travel costs (airfares, taxi, bus etc.) in getting to and departing from Rydges-South Park.

 

 

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