Cooper subregion Preliminary Assessment Extent (PAE) v03

## **Abstract** \n\nThis dataset was derived by the Bioregional Assessment Programme. The parent datasets are identified in the Lineage field in this metadata statement. The processes undertaken to produce this derived dataset are described in the History field in this metadata statement.\n\n\n\nThe first step in deriving the Cooper subregion Preliminary Assessment Extent (PAE) was geologically-based. This involved assessing the extent of coal seams occurring in the Patchawarra and Toolachee formations in the Cooper Basin. These two units are the most prospective for coal seam gas as a result of their extensively developed coal seams, the depth of these seams and the inferred thermal history of the formations. Depths to the Permian coal measures preclude resource development by mining. Although coal occurs in other shallower formations, such as the Winton Formation, no economic deposits have been defined in the Cooper subregion. Screening criteria used in defining the geological components of the PAE were:\n\n\\*\tPatchawarra and Toolachee formation tops at depths less than 2000m (DMITRE, 2001); and \n\n\\*\tcumulative coal thicknesses in these formations of greater than 0 m (Hall et al., in prep)\n\nThese criteria are used as they represent current maximum depths of extraction for coal seam gas (CSG), and the assumption that CSG will not occur in areas without coal. These also represent areas which do not also have resources of shale, basin centred, tight or conventional gas, which only occur at depths greater than 2000 m.\n\n\n\nCoal in the Winton Formation was not included in this assessment, due to its thin, discontinuous nature and poor gas shows in drilling on the Innamincka dome in PEL (Petroleum Exploration Licence) 101 and 103 by AGL Energy. It is thought only to represent a viable resource where it occurs in conjunction with another oil or gas play (such as a basin centred or shale gas play in the underlying Cooper Basin).\n\n\n\nThe next stage in deriving the PAE was to incorporate ecological and surface water features. This was done by intersecting the Geological Components PAE with CAPAD reserves, lakes from 250,000 scale topographic mapping and the DIWA important wetlands dataset. The resultant PAE incorporates areas of potential future CSG-only development which intersect with ecosystems and surface water resources within the Cooper subregion, and includes limited areas of investigation downstream and outside the subregion boundary. The PAE encompasses approximately 52,194 square kilometres and includes the Coongie Lakes Ramsar wetland area, Lake Blanche, the Strzelecki Creek Wetland System, Cooper Creek Swamps-Nappa Merrie, Cooper Creek-Wilson River Junction and some Lake Eyre Mound Springs DIWA wetlands, the Innamincka Regional Reserve and Strzelecki Regional Reserve and two GAB discharge springs from the EPBC-listed GAB discharge springs threatened ecological community. \n\n\n\nThe PAE for the Cooper subregion of the Lake Eyre Basin Bioregional assessment was finalised by extending the boundary along part of Cooper Creek, to join the separated north-eastern section with the main south-western section.\n\n## **Purpose** \n\nThe role of the PAE is to optimise research agency effort by focussing on those locations where a material causal link may occur between coal resource development and impacts on water dependent assets. The lists of assets collated by the Program are filtered for "proximity" such that only those assets that intersect with the PAE are considered further in the assessment process. Changes to the PAE such as through the identification of a different development pathway or an improved hydrological understanding may require the proximity of assets to be considered again. Should the assessment process identify a material connection between a water dependent asset outside the PAE and coal resource development impacts, the PAE would need to be amended.\n\n## **Dataset History** \n\nThis dataset was created by extracting all features from:\n\n- the Collaborative Australian Protected Areas Database (CAPAD) 2010 - External Restricted (GUID: 47312aee-722e-4c6e-bef8-9e439480503e) dataset; \n\n- the Directory of Important Wetlands in Australia (DIWA) Spatial Database (Public) (GUID: 6636846e-e330-4110-afbb-7b89491fe567) dataset; and \n\n- lake features, plus the Cooper Creek from the GEODATA TOPO 250K Series 3 (GUID: a0650f18-518a-4b99-a553-44f82f28bb5f) dataset\n\nwhich intersect with the Geological Components of the Cooper Preliminary Assessment Extent (PAE v03) (GUID: 23851dee-ce38-4734-891b-7b9cac47240d) dataset.\n\n\n\nAll extracted features were merged with the Geological Components of the Cooper Preliminary Assessment Extent (PAE v03) dataset to create the final Cooper PAE v03 dataset.\n\n## **Dataset Citation** \n\nBioregional Assessment Programme (2015) Cooper subregion Preliminary Assessment Extent (PAE) v03. Bioregional Assessment Derived Dataset. Viewed 27 November 2017, http://data.bioregionalassessments.gov.au/dataset/872353f8-9795-42c6-8819-047e1fb05607.\n\n## **Dataset Ancestors** \n\n* **Derived From** [Geological Survey of Queensland Cooper formation thickness grids v01](https://data.gov.au/data/dataset/2cabb0d5-1d99-494b-9497-2bf107bf2bdd)\n\n* **Derived From** [Geological Components of the Cooper Preliminary Assessment Extent (PAE v03)](https://data.gov.au/data/dataset/23851dee-ce38-4734-891b-7b9cac47240d)\n\n* **Derived From** [GEODATA TOPO 250K Series 3](https://data.gov.au/data/dataset/a0650f18-518a-4b99-a553-44f82f28bb5f)\n\n* **Derived From** [Directory of Important Wetlands in Australia (DIWA) Spatial Database (Public)](https://data.gov.au/data/dataset/6636846e-e330-4110-afbb-7b89491fe567)\n\n* **Derived From** [Collaborative Australian Protected Areas Database (CAPAD) 2010 - External Restricted](https://data.gov.au/data/dataset/47312aee-722e-4c6e-bef8-9e439480503e)\n\n* **Derived From** [Cooper Basin Seismic Mapping Grids, South Australia](https://data.gov.au/data/dataset/cdd1625e-64e1-41da-bff4-2e26d0fd4ad1)\n\n* **Derived From** [Cooper Formations Merged Isopach Grids v01](https://data.gov.au/data/dataset/4b1fd4bd-e109-435b-a97d-01fd35ae1b67)\n\n

## **摘要**

该数据集由生物区域评估计划（Bioregional Assessment Programme）衍生而来。母数据集在本元数据声明的谱系（Lineage）字段中标识，生成该衍生数据集的过程则在本元数据声明的历史（History）字段中描述。

推导库珀子区域初步评估范围（Preliminary Assessment Extent，PAE）的第一步基于地质学，包括评估库珀盆地（Cooper Basin）中Patchawarra组和Toolachee组的煤层分布范围。这两个单元因煤层发育广泛、埋藏深度适宜及地层推断热史等特征，成为煤层气（coal seam gas）最具勘探前景的区域。二叠系煤层的埋藏深度排除了采矿开发资源的可能性。尽管Winton组等其他较浅地层中也存在煤炭，但库珀子区域内尚未发现具有经济价值的矿床。定义PAE地质组分的筛选标准如下：

* Patchawarra组和Toolachee组顶部埋藏深度小于2000米（DMITRE，2001）；

* 这些地层中的累计煤层厚度大于0米（Hall等，待发表）

采用这些标准是因为它们代表了当前煤层气（CSG）开采的最大深度，且基于无煤区域不存在CSG的假设。这些标准也排除了存在页岩气、盆地中心气、致密气或常规气资源的区域，这些气藏仅出现在深度大于2000米的地层中。

Winton组的煤炭未纳入本次评估，因其煤层薄、不连续，且AGL Energy在石油勘探许可证（Petroleum Exploration Licence，PEL）101和103号区块的Innamincka穹窿钻探中未发现良好气显示。仅当Winton组煤炭与其他油气藏（如下伏库珀盆地的盆地中心气或页岩气藏）共生时，才被认为是具有开发价值的资源。

推导PAE的下一步是整合生态和地表水特征，具体方法是将PAE地质组分与澳大利亚合作保护区数据库（CAPAD）2010 - 外部受限版、1:250000比例尺地形图中的湖泊及澳大利亚重要湿地目录（DIWA）空间数据库（公开版）进行空间叠加分析。最终的PAE包含了库珀子区域内未来潜在纯CSG开发区域与生态系统及地表水资源的交集，并包括子区域边界外下游的有限调查区域。PAE总面积约为52194平方公里，涵盖了Coongie Lakes拉姆萨尔湿地、Blanche湖、Strzelecki Creek湿地系统、Cooper Creek沼泽-Nappa Merrie、Cooper Creek-Wilson River交汇处及部分艾尔湖丘泉DIWA湿地、Innamincka区域保护区、Strzelecki区域保护区，以及澳大利亚环境保护和生物多样性保护法（EPBC）名录中列为受威胁生态群落的大自流盆地（GAB）排放泉中的两处。

艾尔湖盆地生物区域评估中库珀子区域的PAE通过沿Cooper Creek部分河段扩展边界，将分离的东北部区域与主要的西南部区域连接起来，最终确定。

## **目的**

PAE的作用是通过聚焦于煤炭资源开发与水依赖型资产影响之间可能存在实质性因果关系的区域，优化研究机构的工作效率。该计划整理的资产清单将根据“邻近性”进行筛选，仅与PAE相交的资产会在后续评估过程中被进一步考虑。若PAE发生变更（如识别出不同的开发路径或水文理解得到改进），可能需要重新评估资产的邻近性。如果评估过程发现PAE外的水依赖型资产与煤炭资源开发影响之间存在实质性关联，则需修订PAE。

## **数据集历史**

本数据集通过提取以下数据集中与库珀初步评估范围地质组分（PAE v03）数据集（GUID：23851dee-ce38-4734-891b-7b9cac47240d）相交的所有特征创建：

- 澳大利亚合作保护区数据库（CAPAD）2010 - 外部受限版（GUID：47312aee-722e-4c6e-bef8-9e439480503e）；

- 澳大利亚重要湿地目录（DIWA）空间数据库（公开版）（GUID：6636846e-e330-4110-afbb-7b89491fe567）；

- GEODATA TOPO 250K系列3数据集中的湖泊特征及Cooper Creek（GUID：a0650f18-518a-4b99-a553-44f82f28bb5f）

所有提取的特征与库珀初步评估范围地质组分（PAE v03）数据集合并，形成最终的库珀PAE v03数据集。

## **数据集引用**

生物区域评估计划（2015）库珀子区域初步评估范围（PAE）v03。生物区域评估衍生数据集。访问日期：2017年11月27日，http://data.bioregionalassessments.gov.au/dataset/872353f8-9795-42c6-8819-047e1fb05607。

## **数据集溯源**

* **衍生自** [昆士兰州地质调查局库珀组厚度网格v01](https://data.gov.au/data/dataset/2cabb0d5-1d99-494b-9497-2bf107bf2bdd)

* **衍生自** [库珀初步评估范围地质组分（PAE v03）](https://data.gov.au/data/dataset/23851dee-ce38-4734-891b-7b9cac47240d)

* **衍生自** [GEODATA TOPO 250K系列3](https://data.gov.au/data/dataset/a0650f18-518a-4b99-a553-44f82f28bb5f)

* **衍生自** [澳大利亚重要湿地目录（DIWA）空间数据库（公开版）](https://data.gov.au/data/dataset/6636846e-e330-4110-afbb-7b89491fe567)

* **衍生自** [澳大利亚合作保护区数据库（CAPAD）2010 - 外部受限版](https://data.gov.au/data/dataset/47312aee-722e-4c6e-bef8-9e439480503e)

* **衍生自** [南澳大利亚库珀盆地地震测绘网格](https://data.gov.au/data/dataset/cdd1625e-64e1-41da-bff4-2e26d0fd4ad1)

* **衍生自** [库珀组合并等厚线网格v01](https://data.gov.au/data/dataset/4b1fd4bd-e109-435b-a97d-01fd35ae1b67)