I think you mean Exploratory Essay. Exploratory essays differ from argumentative essays. As opposed to writing in order to convince an audience of the validity of your thesis, you will be writing to discover information about a problem and maybe in order to form some preliminary conclusions about how the problem might be solved.
There is another aspect the exploratory essay that is equally critical. An exploratory essay is, in essence, an account of your thought process as you approach and work through the problem you are exploring. It describes when, how, and why you completed different types of research. In other words, this type of writing talks about how you work through problems that must be explored using writing and research. You will have to be introspective and use meta-cognition or think about your thinking process in order for your essay to turn out well.
Very roughly, your exploratory essay might be structured as follows:
The introduction should outline the problem you explored and why it’s important. Also, you should briefly discuss 1) some of the potential causes of the problem 2) the institutions and people involved with the problem 3) some of the possible solutions to the problem and 4) A brief overview of the types of sources your used during your research.
Body paragraphs should discuss the investigation process you used to research your problem. These paragraphs should include:
Introduction of source (title, author, type of media, publisher, publication date, etc.) and why you chose to use it in during your research, important information you discovered in the source regarding your problem and a discussion of why the information is important and dependable in relation to the problem, some personal introspection on how the source helped you, let you think differently about the problem, or even fell short of your expectations and led you in a new direction in your research, which forms a transition into your next source.
The conclusion should restate the problem you explored, outline some of its possible causes, review the institutions and people involved, and highlight some possible solutions. If you still have any questions about the problem (it’s perfectly to have some), you will discuss them here. Talk about why you think you still have questions regarding the problem you explored, where you might look to answer these questions, and what other forms of research you would have to do.